Hello BillM10, I'm Johrelle an independent Microsoft advisor and a fellow Windows/Microsoft user.
You can remove it through the Microsoft Account website. Here's the link to the website: https://account.microsoft.com/account/manage-my.... Sign in with the same Microsoft account that you used on your Windows 11 device. Once logged in, go to the "Your Devices" section. You might find it under "Security" or "Devices". You should see a list of all devices linked to your Microsoft account, including your Windows 11 PC and potentially the mobile devices you want to remove. Locate the mobile devices you want to remove. Click on the specific mobile device and then select the "Unlink" option. This will remove the device from your Microsoft account and consequently from your Windows 11 settings.