Unknown sources? Yes.
If you’ve updated your Xiaomi device to on Android 10 only to find Google services missing or broken, this "REPACK" version is often the most reliable "no-root" solution available. The Good: --- Google Installer For Miui 12.5.5 Android 10 REPACK
After rebooting, open the Play Store. It may crash once or twice. That is normal. Unknown sources