The only 4 I currently have: Strategery, chess, Thronefall, balatro.
I loved Archero but it’s too casino-y so it’s gone.
Any other favs? Paid or free.
The metal slug games are also on the app store. It's a bit hard to play but you can set infinite lives and it's a fun way to kill some time while waiting around somewhere.
I recall I enjoyed Hoplite, Data Wing, Mini Metro, Super Mario Run, and a few others.
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You probably already know Apple arcade curates a set of games. Many of the 'plus' versions of games have the ad/loot box features stripped or set to "free."