Unfortunately I doubt it. Steam doesn't have a appeal function.
And I understand there is one reviewer who hates AVNs and find stupid reason to reject them (one game was: too realistic" even if it was with nothing that resembled real people).
Steam rules are very interpretable and there's no appeal so basically if you get rejected you are fucked.
They have one rule that "it looks like a child". she doesn't but they can interpret the rules as they wanted because there's no appeal (yeah I know I'm furios about this. mass murderers get better treatment than steam devs.)
Some changes may be requested in some cases, but from what I understand from a few games who got rejected, the rejection is final and you can't do shit. Believe me if I had a real alternative other than steam i would have change platform a long time ago. GoG is nice, but unfortunately is ard to get there as an AVN dev or small indie dev.
I also don't understand why they rejected the game, but if the reviewer hates AVN it can find a way... Maybe some petition will change something if we are enough (f95 people etc). because their rules are shit, no clear instructions, no appeal etc. Basically the same game can be accepted by one reviewer and rejected by another which is shit.
I really hope I'm wrong and this game will get unbanned.