Welcome to why, if you go into some of the trans groups that are away from the pretty toxic social media scene, you can find trans people who are very much for gatekeeping!
Hell, the troons' entire complaint about truscum is that they exist and are pissy about troon appropriation. Insisting somebody actually have gender dysphoria is transphobic, don't you know?
Truscum are transmedicalists--people who believe that you ain't trans if you don't have gender dysphoria. (This is actually why the whole question of "Is somebody who is intersex--not really either--actually capable of being trans, or is it just a really unfortunate fuck-up being corrected?" I have seen intersex junk IRL. Sometimes it's just the doc flipped a coin, or...well, I'm sure we all got questions.)
But yeah, in my experience they do tend to be better at passing, because they actually do want to, so they'll put the effort in. We're talking shit like learning makeup, getting competent at ensuring the bulges are where they should be, changing their body language...some even actually get walking right.