For what it's worth, it's mostly also fine if you search BlueSky.
It's actually pretty trivial to compare across Twitter-like platforms, how much transphobia there is.
Twitter is the worst.
Then Threads.
Then Bluesky.
Then Fedi.
Is there transphobia on Fedi? Of course there is.
But if you're on a half-decent instance, you're probably not going to see it very often.