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Comment by tencentshill

14 hours ago

Any device with Google services installed has all apps scanned at least once per day.

>Real-time protections for non-Play installs Google Play Protect offers protection for apps that are installed from sources outside of Google Play. When a user tries to install an app, Play Protect conducts a real-time check of the app against known harmful or malicious samples that Google Play Protect has cataloged.

https://developers.google.com/android/play-protect/client-pr...

They will also go further for apks with novel signatures - take a copy, upload it to google to decompile and scan, and then if you have their express permission, allow you to install it.