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
Since APKs from third-party stores aren't installed automatically like those from the Play Store, you'll need to follow these steps: You searched for How download backgrounds - APKsPure
Go to your device Settings > Security (or Apps > Special app access ) and toggle on "Install unknown apps" for your mobile browser. If you find a discontinued or region-locked background