I don't see what your problem is with the chart, marting.
I don't know when (or even if)
"kids 5-9" were vaxed in Finland. Maybe Vixen can tell us. However, I do know that the other Nordic countries than

didn't let go of all other pandemic precautions than


(including 'studying from home') till the winter of 2021-22, which was when excess mortality in

really took off and even overtook

. Until November 2021,

and

had negative excess mortality.
So you are right, there is a
correlation (!) between excess mortality and


, which was more or less complete (first two shots) by the summer of 2021 (earlier in

than in

,

,

and

because
sold 1.17 million Pfizer-BioNTech jabs to 
):
Excess mortality: Cumulative deaths from all causes compared to projection based on previous years, per million people 



But there is also the correlation that, after the


,

,

,

and

(also) gave up on masking, TeTrIs, working and studying from home etc. In fact, people in

were told to go out and get infected during Omicron because it would allegedly give them
"super immunity": "Vaccinated + infected = super immunity". I assume that people in

,

and

were told something similar.
You could say that the other Nordics embraced

's herd immunity by infection post-


, so that was when C19 dying really took off. I don't know why excess mortality got so much worse in

than in

,

,

and even

, but if it had been due to the


, it should have happened earlier in

than in

.
The lesson is that
"the excess deaths don't occur until the latter half of 2021. Over a year after the start of C19!" because that's how effective the (not at all 'draconian') restrictions were in the four other Nordics than 
for the first 18 months or so of the pandemic.
Unlike most other European countries,

,

,

and

have the advantage of being very sparsely populated, but

didn't really use that advantage for anything. On the contrary, it pursued Anders Tegnell's herd-immunity-by-infection strategy from the get go by keeping schools, bars and restaurants open and telling people that face masks were dangerous etc.
As for the other thing that 'jumps out':

is a fairly small country, 5.6 million. I don't think it's weird that there were weeks when no kids aged 5 to 9 died. If they were not at home, they were probably meeting outdoors. The restrictions meant that infectious diseases other than C19 were also rare. And the

must have stayed calm for whatever reason.