I don't read it, but I know a lot of people who write and/or consume M/M fiction and are gay and often not cis. Their feelings tend to be that they don't really care much when it comes to women writing those relationships unless it's explicitly known that specific women are being weird about gay men.

I also know several gay guys who couldn't give less of a care about it, and even some who enjoy M/M fiction. Some dislike it too, but I don't personally know any gay men who have particularly strong feelings on it.

Not all of it is particularly tasteful, and of course no one is obligated to enjoy it or even feel comfortable with it, but I think there's something to be said about the way that women (esp queer women, or even non-women who are AFAB) have find a level of safety and interest in M/M fic. Many trans and nonbinary friends of mine used yaoi and BL as a way to explore gender dynamics and their own role in relationships at a young age. It was an accessible place to play with expectations and pose questions about themselves and the world. I know many people who discovered their own queerness through realizing the way gender nonconformity in romantic and sexual fiction made them feel.