Silent installation of applications without your confirmation or knowledge is a privileged permission reserved for preinstalled apps. So Samsung can provide a 3

Silent installation of applications without your confirmation or knowledge is a privileged permission reserved for preinstalled apps. So Samsung can provide a 3rd party store on their phones that can silently install applications on your phone while others can't. This was changed in Android 12 (I think) where silent app installation is a grantable permission for other stores like F-Droid.