I am extremely submissive and have not found a single instance of M/M content outside the prologue. Nor have I found any ability to even *be* submissive, at all, though I have found options of "not being a complete fucking asshole" which for some reason increase your submissiveness, as if there's any connection whatsoever.
I kind of get the impression that the MC is locked to heterosexual and your conception of M/M content is "haha MC is forced to submit to men despite being straight."