I added "permission":["com.android.vending.BILLING"] in app.json.
but google gives error that I should use Billing version 3 but I can't found how to do so in expo managed app.
You probably use:
expo build:android
command to build your app.
But after you ejected the app from Expo managed workflow into bare workflow, you must execute:
eas build --platform=android --profile=production
instead.
I just figured out this on my own prject, had fully the same error.