Mobile games usually get a bad rep as they’re usually asset flips and/or MTX-ridden and/or ad-filled, etc., and I’m sure this is actually the case for most games on the app/play store. But are there any ones that are actually good, maybe just something to pass the time with?
Stardew Valley, which is an amazing harvest moon like game, and subnautica if your device is compatible.
Another good option is to download winlator from the internet and use it to play older Windows games. I play FTL on it. You could also play stuff like Civ probably. I think civ 5 has a touchscreen mode.