No dear that is not the problem due to new google policy there is some terms for background location tracking they ask for pop-up disclaimer before permission granted and also dev have to proof that app requires background locqtion feture in the app too much complicated i just make an apk and distributed offline..
- Note: When you publish the app to playstore , you must have to submit publishing apk "SHA-1" & "SHA-2" keys in Firebase After publishing , go to Release Management by selecting specific app then click "App Signing" option. You would have to copy "SHA-1" , "SHA-2" keys from the "App Signing Certificate".
be sure there is no additional non required services imported