Apk download
Starting from v5.2.0, AppOps supports Sui. If your device is rooted, you can try Sui, it only requires you to install a Magisk module. (Select Shizuku mode)
Restore purchase from Google Play
To purchase or restore purchase from Google Play, you may have to install the app using adb.
adb install -i 'com.android.vending' <apk path>
This is because Google Play may refuse apps not installed from Google Play to initiate the purchase. The -i 'com.android.vending' in the command specifies the installer as Google Play.
Just a backup
v8.0.1 (1603) (Incompatible with Android 14+)
v5.5.6 (1453) (The last version has Device admin mode, incompatible with Android 11+)