Some developers create a fake launcher. It shows the Forza Horizon 3 logo, then crashes and prompts you to download a separate "OBB" file from a locked file hosting service (like adfly or shorte.st). After jumping through hoops, you get a cheap, low-poly clone of an open-world game that is actually a renamed version of a generic racing game from 2012.
: Forza Horizon 3 reached its "end-of-life" status on September 27, 2020, and was removed from official digital storefronts like the Microsoft Store. Forza Horizon 3 Android Apk Obb Download - - Google