Android SHA1 release keystore not working with Google Maps
You have two google_maps_api.xml files
One in this folder:
app/src/debug/res/values
Other in this folder:
app/src/release/res/values
But only the debug one contains your API key probably.
1) Usually, you have to Clean and Rebuild the Project so it can work.
2) Make sure your build variant is on Release (Android Studio is friendly on this)
3) Also if you are debugging on your devices fully uninstall first then continue.
4) As the documentation says, make sure you have set up your manifest correctly.
Hope it helps.