So why hasn’t this happened on Android? The App Store that protects users but also is where all the people go so they have the power to force Fortnite, TikTok, Facebook, etc to all do the right thing?

As others have pointed out, this only works as well as it does for Apple because there isn’t a reasonable way to side load apps. As soon as there is, Facebook will just jingle their large carrot on their own distribution system that lets them do whatever they want.