Open the Google app, Gmail, or any Google service you are signed in to
Tap your profile picture in the top right
Select Manage your Google Account
Go to the Security tab
Scroll to Your devices
Tap Manage all devices
Select the device you want to sign out from
Tap Sign out
Confirm if prompted
To log out of a browser, click your profile picture in the top right
Click Sign out or Sign out of all accounts
To remove an account from an Android device, go to Settings
Tap Passwords & accounts or Accounts
Select Google
Tap the account
Tap Remove account
Confirm if prompted