Emulation is a great idea. Dead cells is pretty fun on the go. Slay the spire will also kill a lot of time plus easier to play on a plane probably.

Shattered pixel dungeon is fun little rougelike dungeon crawler

Siralim Ultimate, Mindustry or ReFactory, Wreckfest

Dungeon Maker is a fun little roguelike/strategy game I've been playing atm https://play.google.com/store/apps/details?id=com.GameCoaster.DungeonMaker&hl=en&gl=US You hire and level monsters whilst building a sorta dungeon with traps for heroes.

Since you mentioned Minecraft and farming simulator, both Terraria and Stardew Valley are on android, though I can't speak for their quality or playability.

Emulators are a pretty good shout, PPSSPP was pretty great when I last used it which was a few years ago now, so I imagine possibly better now and the PSP had a decent selection of games.

You could also try Google Play Pass for a month and look at a few paid games and see if anything tickles your fancy there, but subscription service.

If you've got the cash I think the Steam Deck is still discounted. With that you could play all the games you listed.

If not, Shattered Pixel Dungeon is awesome. And people seem to like Mindustry. I haven't tried the latter yet. You can find lots of games without any bullshit on F-Droid.

Grand Mountain Adventure, its fun, you can play it in bursts or over longer periods and has a catchy soundtrack!

Monument valley 1 and 2 are both beautiful