I simply wanted the Library folder to be displayed within the Go menu like every other folder does.
When I hold down the Option key inside the Go menu, there it is (Library) until I release the Option key, then poof, it's gone.
It's obviously not a big ask, it works like a gem in Path Finder.
And yes, it does unhide it from my users/myname folder but that's not what
I was after.
Then you're going to be disappointed, because nothing does what you're looking for. The command that was posted was to unhide it, not make it appear in the Go menu. The only way to do that is to hold the option key.
jW