Brain scans dont determine if you are trans or not. Only you know. I get a lot of trans folks are desperate for some kind of validation but not only is this not scientific, its dangerous. Its not scientific because they get things backwards.
Being trans isnt caused by brain differences. The brain differences are sometimes caused by being trans. I know thats hard to understand but thats kinda how it is and being trans doesnt always mean there will be brain differences.
So its not any kind of meaningful test.
Its dangerous because you are handing power over who is and isnt trans to people who are not you.