I went from trans-tolerant ("do what you want it's none of my business") to trans-supportive largely because of parasocial relationships with trans creators: PhilophyTube, ContraPoints, JessieGender, Jimquisition, Chipflake, Jammidodger, and NOAHFINCE. Then there's nonbinary and trans-adjacent creators like Thought Slime (some kind of nonbinary?), CJ the X (nonbinary presentation?), Mother's Basement (gf is Yazzie, trans woman), and Shaun (has entire hour long campaign videos about the BBC's transphobia). Point being, knowing a trans person IRL is much less of barrier than you'd think since parasociality seems to cover it, and trans and trans-supportive creators have gotten a lot more open about being on the internet.
(yes NB is considered trans but 1. people don't generally think of it that way and 2. I'm an AMAB demiboy and feel like that me being "trans" would appropriate the struggles of "real" trans people when my own identity is a "rounding error", and to a large degree feel like gender nonconformity is less stigmatized than out-and-out binary trans people. I'm not transmedicalist, NB are still valid and may or may not want their own gender confirmation stuff, but feel like "trans" as a label is too broad an umbrella, since it basically covers all gender nonconformity)