All of my favorite high quality mobile games are desktop games that got ported. The ones I play the most are [1]Baba is you, [2]Into the Breach (requires a Netflix account), [3]20 Minutes Till Dawn, and [4]Vampire Survivors. Granted I'm not a mobile power gamer by any means, I usually only pull these out when forced to wait an extended period of time for something.

1: https://apps.apple.com/us/app/baba-is-you/id1517281887?platf...

2: https://apps.apple.com/us/app/into-the-breach/id1616542180

3: https://apps.apple.com/us/app/20-minutes-till-dawn/id1635123...

4: https://apps.apple.com/us/app/vampire-survivors/id6444525702