M1 MacBook Pro on Monterey will not share files

I have just replaced a 2013 Pro with a MacBook M1 14" Pro. All my master files are kept on the Pro. When it is in use I use an M1 MacBook Air on Monterey and work on the master files using Sharing. I also have an Intel MacMini on Monterey which also had no issue accessing all the files on the old 2013 Pro. Since getting the replacement M1 Pro, I have found that Sharing does not work. I can access the Pro from both the Air and Mini Finder Go menu, sign on as Administrator, and see the root folders including Desktop. When selecting and opening the Desktop file, nothing appears - it will not access the required files.

The Pro will successfully access all files on both the Air and the Mini. I therefore assume that the issue is the new M1 MacBook Pro as it is the only Mac that will not allow others to access the files in the desktop folder. I have tried smb//*.* and the same thing happens - I access the full MacPro disk, I can access the root folders, but it will not provide access to the Desktop files. I do not use FileVault so this is not the issue. Does anyone have any suggestion as to how this can be fixed - or is it a fault with the new MacBook Pro?