Ticket to Ride is fun to play on mobile with CPUs or with Friends. One time purchase per game board.

Doors games are fun puzzle games. IAP to unlock levels

Knotwords is a fun wordle/crossword puzzle type game. Subscription or one time purchase.

Night of the Full Moon. Slay the Spire esque game with multiple IAPs to unlock new characters/ Remove ADS(Which I would recommend) but you can try for free.