https://conicgames.github.io/exponentialidle/
https://apps.apple.com/us/app/exponential-idle/id1538487382
https://play.google.com/store/apps/details?id=com.conicgames...
I'd say my main issue with idle games is how much they reward you for active play. In Cookie Clicker's case, at random, golden cookies will appear that when clicked apply a random boost, e.g. a 7x multiplier. Eventually you unlock upgrades so that another one may appear while the boost is active, leading to a double boost. The ultimate combination involves a multiplier, a boost to cookies per click (again active), then selling a lot of buildings for an additional short-lived bonus, then clicking like mad.
You can earn a year's worth of idling / not playing within a minute then. If it's not more.