It's another area of vocabulary that is often misunderstood and used inconsistently, and sometimes the inconsistency is just equivocation.
Some people use "transition" to refer only to medical treatments (hormones, puberty blockers, surgery, etc.) while others include "social transition", which is what you have described.
I'm not complaining about the way you are using the language, just lamenting that it gets hard to talk about sometimes because a person will say "transitioning" and it might not be possible to understand what is really meant by the term.