Since APKs from third-party stores aren't installed automatically like those from the Play Store, you'll need to follow these steps:
For larger background apps that come in .xapk format (which include additional graphics data), using the APKPure App simplifies the process into a single click. You searched for How download backgrounds - APKsPure
Install an app from unknown sources on Android device - PandaSuite Docs You searched for How download backgrounds - APKsPure
If you find a discontinued or region-locked background app, you can download the APK file directly to your device and install it manually. Essential Steps for Installation You searched for How download backgrounds - APKsPure