Regardless of the fact that it was written by fujos, it was well done imo.
The Banana Fish manga is getting an anime next year…also written by a woman, but from what I've heard there's some actual gay scenes between the MC and another character? Not super explicit, and it's less on the frontlines of the story (meaning that the sexuality is more ambiguous). But there's that.
In all honesty though. It's really unlikely we get an anime ABOUT gay or bi men, written BY actual LGBT people. I seriously doubt any studio would want to make an anime about it. The only ones with male-on-male romance so far have been done by fujos and they're bottom-of-the-barrel with terrible tropes just for girls to masturbate to. Like Doukyuusei is an anime film from a manga about gay love between 2 classmates, but if you watch it it's really just made for fujos. But I can understand the appeal too since there isn't much else out there.
Even the creators of Yuri on Ice had trouble convincing the other staff to show actual male on male romance/love onscreen.
UNLESS a studio makes, say, an anime adaptation of a gay manga like My Brother's Husband by Tagame which is really the only gay manga written by a gay male that has some recognition in Japan. Yeah sure it's about really boring topics like accepting gay people from straight people's perspective, but at least it raises the awareness.
Fumi Yoshinaga's What Did you Eat Yesterday would also be a candidate, the MC actually has a boyfriend and they make different food together. It's cute.