Can I get MacOS to treat an external drive like a normal volume?

Solution 1:

The T7 SSD has been converted/erased to APFS. The macOS operating system automatically creates a small EFI partition at the beginning of drives with a GPT and size above a certain limit. I suppose this is done incase you choose to install a operating system now or in the future. You can not accidentally eject an external drive that is in use by an application. You can select "Full Disk Access" under the Privacy tab of the Security & Privacy pane in the System Preferences application to add applications. This may reduce the prompt for access.