ISEPS and CIFI, both by Octocube Games, have kept me hooked for several years now, albeit they tend to land more on the idle side of things, at least the way I play them.

Dodecadragons is more active most of the time, and IMO is absolutely fantastic. It recently reached completion, but I just found out while writing this that apparently some people bullied the dev so hard they pulled the game down earlier this week. Still, they have some other games at https://demonin.com/ so show them some support. Try Array Game!

I also played Tap Wizard RPG on mobile for a pretty long time. It's good stuff.