Not unless there is a massive change in society that normalizes sex and doesn't view it as taboo. Also there would be must be away to prevent people from under 18 from accessing and playing the game.
I think it has existed in the past but in this era probably not because of general content restrictions and fears of getting bad public brand reception
unlikely, most people don't play these kinds of games and regulation is a pain in the ass. Too much investment for little return, we can at most expect things like Stellar Blade, doubt anything past that would happen.
Never. That takes real money, not the thousands, but tens of thousands, hundreds, millions. Credit card companies cave super fast to even mild moral panic.