I'll check that outSpin the dial marked as “Tune.”
unless you’re asking about getting back to the Ford menu?
if that’s the case, Apple CarPlay has a Ford logo on one of the tiles. I’d assume Android is similar. Press it and it’ll go back to the Ford Sync menu where you can select the audio tab and do what you want there.
Then in the options across the bottom of Ford sync you should see an Android Auto button to return to that service. (I see Apple CarPlay since I’m iPhone).