The title is a bit misleading. This study isn't evidence that gender affirmative care causes suicide. Trans people have a higher rates of suicidal ideation and suicide attempts than the general population. Therefore you'd expect that people who seek gender affirmative care would be at a higher risk than the general population
If the study was comparing people who got gender affirmative care vs people who didn't but were also trans then it would be more illustrative of the effects of gander affirmative care (although I expect the effects would be positive, not negative, as it should lessen never dysphoria in most people seeking it out)
Nothing against the people conducting the study but I don't think this is saying what this community wants to believe it's saying