Seeing "Logout is pending"
When you log out of WhatsApp Business from your phone or a linked device it should happen immediately, but sometimes there can be a delay where you aren’t logged out completely. When this happens after trying to log out, you may still see a device listed in the Linked Devices section on your phone and see the status as “Logout is pending.”
To log out completely, try checking your internet connection and restarting your phone. If your phone still can’t log out the linked device, it’ll automatically remove all remaining linked devices.