1: Frankly I'm not familiar with the rules of what's allowed on here or on patreon. I'm not a creator so I don't really have to worry about it. Can't post something against the rules if I'm not posting anything.
2:
The direction of the seduction and which character is the player character really aren't significant. Men fantasized about seducing, dominating, coercing, and whatnot women when they were kids and as adults they fantasize about having done it as a kid. Men also fantasized about being seduced, dominated, coerced, and whatnot by woman as a kid, and as adults fantasize about it having been done to them. Group all the causes of "yay sex happened" into simply "initiation", and we can simply say that it doesn't matter who initiated, the shota or the woman, because it's still the woman that's the target and the shota is still just the self insert for the man playing the game. Likewise, whether the fantasy is being iniator or initatee, both fantasies can be lived out in the game regardless of which character the player controls. A man with a fantasy about teachers initiating on him as a kid is still going to enjoy the game where the player character is the lady teacher. Naturally, all that can be reversed for the loli situation to say it's still about the loli. So the question about the distinction between the direction of initation and who the player controls might be worth asking, but the answer is that it doesn't matter, since it doesn't change anything. This might be a bit of an overstatement, but basically, no matter the direction the game or whatever goes, barring the occasional exception, loli is for pedos and shota is for regular healthy men that had fantasies as a kid.
As for the inclusion of other underage characters besides the shota himself in a shota porn, well, I guess people can use the defense "hey the character I'm playing as is a minor so it's not pedophilia, it's a minor with a minor" and as such live out the fantasies they had as a kid about step sisters, real sisters, classmates whoever else without feeling like it's bad. Because, in their mind at least, it's not adult them looking at a kid, it's 14 year old them looking at another 14 year old they knew back then. Is that a good defense? A valid one? I guess I don't really know, but it's clearly been accepted, not just here but in general, considering all the games, movies, shows, and whatnot targeted at adults but taking place in high school or whatever. I mean, Persona 5. A game where you play as a highschooler and seduce like 100 other kids, and though there's no actual porn they all get an implied sex scene sooner or later, but the game is widely succesful with nobody accusing it of catering to pedophilia or even being appropriate, since you *do* play as a kid yourself.