Play store is unusable tripe. I member back in the day there being websites and forums that actually gave honest insight into what was good and what was trash. Anything like that today? Where does one find the good android games nowadays while avoiding all the shovelware crap?
Actually the official google “play games” app has a nice feature that should be included in play store: it can filter for games without purchases.
Other than that, the mentioned minireview app has good filters.
Can it filter for paid games only with no in-app purchases?
The “play games” can. Three filters I always use in combination: “Premium” (i.e. paid), “no ads”, “no in-app purchases”. In the current version of the app you have to scroll quite down to find these.