Not a fan of Smartphone games, but here a Reminder:
Controller and even sometimes keyboard and mouse might be supported on phones.
Then they would only be weak computers, which is fine depending on the game.
Also in question of competitve:
Imo phone-games don't need to be compared to PC/console games, with the argument, that phone-player have a disadvantege.
I mean phone-player can play against each other competitive. Crossplay is only an option.