How to check and remove unkown devices connected to your Gmail account on your phone

To view the devices connected to your Gmail account, open the Google App.
1. Tap on your profile picture in the top-right corner.

2. select “Manage your Google Account.”
This takes you to your main Google Account dashboard.

3. Once in your Google Account, tap “Security and sign-in” in the left sidebar.

4. Scroll down to “Your devices” → Tap “Manage all devices.”
This shows you all devices where your account is currently or recently signed in.

5. You’ll see a list of Devices connected to your Gmail account. In this case I have chosen to disconnect "Google Pixel 6 Pro".

6. Tap “Sign out” to remove the device.

7. Confirm the action in a pop-up window.