DISCLAIMER: Expressed views on this blog are my own.
If you've tried to export a Godot game for Android target, you most likely ran into errors when you checked Gradle box like "Unable to locate a Java Runtime" or whatever. Annoying since there is no logs of the commands run nor environment variables.
Follow instructions here: https://docs.godotengine.org/en/stable/tutorials/export/exporting_for_android.html Come back when you reached the error.
I use Mac OS and opening Godot from Applications folder will not contain a JAVA_HOME variable.
Open a terminal and just open -a "Godot" or whatever the application is named on your Mac. Export again and it works.