Protopia, please I have read your 3 posts and I'm trying to be helpful and this is not an "anyway" answer.
In post 1 "If I enable the Libraries node in File Explorer, nothing happens. If I try to add a director to a Library, the list of libraries is not populated." To me that that means the Libraries node in File Explorer is enabled but nothing happens as opposed to it isn't there.
In post 3 you mentioned "@FreeBooter - I know about that and it doesn't work - ditto for right clicking in the navigation pane and selecting the same."
--- I interpreted that post to mean that it doesn't work as opposed to it isn't there.
So maybe I need to interpret what I thought better than I did but I cannot see your computer
So now in post 5, you say that "That is the issue. I need to get the Libraries node to display in the navigation area."
--- I've done some research on Cannot unhide the data libraries in Windows 10.
--- Not much yet but as you said, the Libraries folder doesn't display in the navigation area is the issue.
When you click on View, then on Navigation Pane: do both Navigation pane and Show libraries have checkmarks?