Amazon has a still function Android app store. Windows has a massively greater marketshare than Blackberry ever had; if it's easy for developers to add drop their apk onto another app store, why wouldn't they?
Most phone apps made little sense on desktop. And for a lot of them there are more compelling native or web offer. Finally for games, editors usually forbids running them on PC via emulators since it’s easier to cheat than on mobile.