Deleting Default BigSur Apps

No you cannot delete the built in apps on a mac, that are part of the system,

and the system is on a read only Volume meaning you cannot add delete

or edit items on that Volume.

These apps take up very little room, just ignore them.

I'm aware of what OP is asking.

AweEraser for Mac also offers uninstaller and internet cleaner. The uninstaller can help you uninstall applications in batches and delete all related files including app junk, registry files, caches, etc.

I stand corrected !

This is my first Mac.

I figured it would be as easy to un-install as the preloaded bloatware that came on my iphone especially with a 3rd party paid for program software.

But of course it is'nt . . . It's Apple.

That fact OP even has to ask this question is bothersome to me.

Yes, you are correct because I actually tried but the option was greyed out.

You could use AweEraser4.

Other tools > Uninstaller

The OP is asking about erasing Apple apps not erasing files or folders.

What incredible feature of AweEraser allows it to delete items from a read-only volume. Could you explain how it manages to do what absolutely nothing else in the world can do?

As said earlier the Apple apps are on a Read Only Volume they cannot be deleted.