If all the above methods fail, you can also turn on your mobile phone, click the "Settings" icon on the desktop, enter the settings page, and click the "General" option.
Then find the "profile" in the list, delete the profile and restart the phone, and you can delete the bookmark on the desktop.
If there is no X on the icon to be deleted, you can block it through the access restrictions in the phone settings, and there will be no icon on the desktop.