Not going to be everyone's cup of tea, but I've been enjoying Idling to rule the gods. (Steam/Android cross save)
It's an idle game that could take years to "beat", has a pet collection/dungeon game that's pretty fun.
You can progress only checking in a couple times a day for a few minutes, some challenges (for progression/QOL upgrades) require more activity, but overall has a nice feeling of day to day improvement.