I haven't seen much harassment on that sub. There are sometimes posts about trans men. There was a post asking users if they would date an AFAB enby who was male presenting. I see nothing wrong with that post. There are also posts once in a while that gay men should date X group or they are awful, etc. Those are not OK either. Unfortinately the mod is extremely lenient and doesn't remove those kind of posts.

However frequently on that sub gay cis men are telling gay trans men they are female even though they aren't or saying men do not have vaginas. Most men don't have vaginas but some do. r/ActualLesbians doesn't tolerate this kind of transphobia, why should AGB? If I were a mod there, I would ban any post that would be more appropriate for gender critical or LGBdroptheT. I asked the Reddit admins to add a trans man as a mod.