Well that's the point. If condition A is being misdiagnosed as condition B and there is a dramatic increase inthe understanding of and detection of condition A them.you should see a drop in the diagnoses of condition B.
Since autism is being understood and recognised more than ever and we are not seeing a drop in diagnoses of GD then it is extremely unlikely there was ever any significant misdiagnosis of autism as GD.
It's not an issue of misdiagnosis, it's an issue of comorbidities, which despite its grim sound is a neutral medical term for conditions that frequently accompany other conditions.
There was a steady rise in the number of children, teenagers and adults diagnosed with autism or ASD through to the 2000s. In the same era, diagnoses of gender dysphoria were extremely rare; autism was far more common, as were ADHD, depression and other conditions.
In the 2010s, there was an explosion of teenagers presenting with gender dysphoria. There was also a general degeneration in the mental health of teenagers, with higher rates of reported depression, anxiety disorders, etc.
Among the ROGD cohort of teenagers of the past 10-12 years, a very high proportion were already diagnosed with ASD.
The number of children and teenagers identifying as trans is not easily established, but it appears to be on average lower than the number diagnosed with ASD. However, there are clusters of trans identifications in peer groups, specific schools, rather than a truly even distribution as one might expect with something rooted in neurology or fundamental personality. Social approval/disapproval might explain some of that, but there is much evidence to suggest there is a social contagion element, as with anorexia, which should not be difficult to accept, since anorexia and gender dysphoria both involve discomforts with one's physical body.
Moreover, the ROGD cohort follows a short-lived pro-ana (pro-anorexia) scene on Tumblr a decade or so ago, this was fairly rapidly shut down, whereas trans identities and the gender umbrella were celebrated and encouraged.
Since boys are overrepresented among ASD diagnoses, it's truly concerning when girls are now the majority of gender dysphoria referrals, yet the proportion of trans teenagers who *also* have ASD is very disproportionate to their share of the population. IIRC in one of the Tavistock GIDS chorts - not all patients, but in a year or two during the rise - it was as high as 28%, versus 2.3% for the US youth population as a whole around the same time in the 2010s.
In other words, trans-identifying British teenagers in one cohort were well over 10 times more likely to have been diagnosed with ASD than the average teenager, but if one factors in the male disproportion of ASD diagnoses, then this could be 40 times more likely for teenage girls identifying as trans boys t be autistic than the average for all teenage girls.
Trans-identifying teenagers are most likely to be same-sex attracted, very likely to be neurodivergent and very likely to have other mental health conditions. Disentangling chicken and egg with these children - working out if they were already depressed/anxious and then seized on gender identity as a way out, or if distress over their gender dysphoria made them depressed or anxious - is evidently not very simple.
That is the take-home lesson from the Tavistock GIDS centre in London, as discussed by Hannah Barnes in Time to Think and as confirmed in multiple whistleblowing cases, lawsuits, and the Cass Review, here in the UK.
The UK's national health service rations healthcare while making much of it free, versus the US system being a combination of Medicare and private healthcare. Whether in a rationing-based or market-driven healthcare system, there will be immense pressure to reduce the amount of time needed to deal with a patient. It is much, much easier for doctors to prescribe SSRIs and other drugs than organise talk therapy; it is also much, much easier to affirm a patient's gender dysphoria and start prescribing puberty blockers then hormones. It is obviously much more expensive to carry out extended therapy to work through multiple comorbidities.
The fact that there are now 100 gender clinics in the US makes this big business within healthcare. Some of that is certainly down to increased
genuine demand, but it's only two decades since Oxycontin and other painkillers were over-prescribed by US doctors, kickstarting the opioids epidemic. It would be extremely arrogant to think that medicine and psychiatry, which have screwed up repeatedly in our lifetimes, got this one entirely right when they've messed up spectacularly in the past 25 years.
Overly rapid gender affirmation and medicalisation has not been happening on quite that scale, where entire high school/college football teams were decimated by overdoses within 5-10 years, but enough that there is now caution in northwest Europe (England, Sweden, Finland and potentially Norway) and a wave of bills in red states in the US, attempting to ban outright any form of gender identity medicine for children and teenagers.
As d4m10n said up-thread, political polarisation in the US is making all of this worse, because red states want to ban teenage transgender medicine while blue states set themselves up as trans sanctuaries and aim to ban 'conversion therapy'.
Neither model is the one now being proposed in northwest Europe and Scandinavia, despite some of the countries having permitted youth transition for as long, or even longer, than the US, like Sweden. There is a trend to restrict drugs and surgery for under-18s among medical professionals and health services in Europe, which means self-regulation, rather than allowing politicians to intervene with legislation and bans.
The chief reason for caution is the extremely low quality of research monitoring what amounts to a realtime experiment over the past decade on a distinctive cohort of teenagers with gender dysphoria, some of whom are now seriously regretting opting for medicalised transition, others of whom are displaying the negative side effects of the drugs and surgery.
It's quite likely that trans identification will start to fall somewhat, as teenagers learn and realise just what the side effects and consequences are. Hannah Barnes' book on Tavistock was a history, and there were many reports of families and children even as recently as 5-7 years ago not being aware of the possibilities - of the availability of puberty blockers or what their side effects might be. Many detransitioners feel they were not properly informed of them, or that they were too young to properly understand what they might be.
And indeed, Jazz Jennings, who was the literal poster child for trans kids over the past decade, is now extremely unhappy with the results of surgery.