Not quite what you’re looking for, but I think you might enjoy Worldbox for a nice and relaxed, long-term game! It’s a fun god game with the twist that the inhabitants of your worlds are alive and doing their own thing, be that farming, building cities and kingdoms, forming empires, or making alliances and waging wars all without your input (although you can meddle in the affairs of the world as much as you wish). It’s free (with a single $7 premium purchase if you love the game and want to support the dev).
iOS: https://apps.apple.com/us/app/worldbox-god-sandbox/id1450941371
Android: https://play.google.com/store/apps/details?id=com.mkarpenko.worldbox&hl=en_US
Steam: https://store.steampowered.com/app/1206560/WorldBox__God_Simulator/
On this note The Battle of Polytopia is an extremely fast-paced turn-based strategy game, like a Civ-lite you can finish entirely in 30 turns or less instead of 200-500 :)
Edit: Recommending Worldbox too lol it’s a fun god-game you can leave and come back to whenever, just save your world’s progress in the meantime.