I've been getting a ton of transphobia lately on here

There has been a serial troll on an unmoderated instance harassing people here. We've defederated from that instance now. The troll can of course make accounts on other instances, but they'll get shut down and banned from moderated instances

If your instance defederates another one then your instance will not download posts or comments from members of that instance. You won't be able to join communities from that instance either. So afaik that is the most effective way to prevent seeing any content from or interacting in any way with members of transphobic instances. But I'm sure someone more knowledgeable than me will chime in.

If you see any transphobia on this community please report it and it will be removed and the commenter banned permanently.

I guess I'm kind of confused -- by "on here" do you mean in this community, on blahaj.zone, or just on lemmy in general?

(I have not run into transphobia in any of those places, but I stick to a pretty small set of communities)

As Lemmy grows more popular and more people join, eventually more transphobes and other trolls will find a place on the site. If the mods of your instance defederate from instances that host transphobic communities or users, that would help. The instance that this community is hosted on has been doing a good job of that.

Commenting for support! Keep your chin up! 🖤

You might want to look at other instances. Artemis.camp has a great group of mods that are always trying to get rid or or outright defedirate from a instance that have this kind of content.