Open the phone’s Settings app
Tap Passwords & accounts, Accounts, Users & accounts, or Accounts and backup
Select the Google account you want to remove
Tap Remove account
Confirm by tapping Remove account again or OK
If prompted, enter your PIN, pattern, password, or fingerprint
Repeat for any other Google accounts you want to delete from the phone
If you want to delete the Google account itself, go to myaccount.google.com on a browser
Sign in to the Google account
Open Data & privacy
Scroll to More options
Tap Delete your Google Account
Follow the on-screen steps to confirm deletion