Yes of course I should have been more thorough:
I have a MAC Mini M1 16 GB
On my desktop, I have a folder called "Watched". It is used by Lightroom Clasic to automatically import photos in LrC each time I open the program.
Apparently, when working in my Pictures Folder on the MAC, I inadvertently moved the iCloud Photos folder to the "Watched" folder, hence causing me to "lose" access to my Photos on my MAC.
I've since discovered my idiotic error and returned the iCloud folder to its proper location in my Pictures folder.
I apologize for causing anyone undue trouble.
Thanks to everyone for the super fast replies and help.
Al Bartos