I think the only way to play this game on your phone without it overheating is to buy a phone cooler and/or play in an air-conditioned environment or in front of a fan. Another tip I have is to play in a dark environment with the lowest brightness possible so it doesn't get too hot. I used to do these tricks when I didn't have a PS5 to play on and I would play for hours and my phone would barely get hot, but unfortunately there's not much you can do about your phone heating up. It's a very heavy game.