This was literally the first result when I googled "post op trans suicidal thoughts study" (n > 27k)
https://jamanetwork.com/journals/jamasurgery/article-abstrac...
So, seems like there is indeed evidence?
The study was performed online and links were posted exclusively in transgender support forums.
Your standards for "evidence" reach the heights of biased activist SurveyMonkey CSVs? I'm convinced!
Seems like a great way to get a lot of datapoints is to use a transgender forum. Seems like a great way to measure suicidal thoughts is to ask "do you have suicidal thoughts"
So seems like a great approach to gather a lot of evidence for the question at hand?
Seems like you just don't like the evidence because it doesn't reach the rather bigoted conclusion you want it to