Thanks for the input Aeryn. Nothing of this helps me though.
I have done clean installs as well as updates during the last 2-4 years, as well as different computers. To no avail.
I do have the Metadata folder at my current setup. It contains two folders;
My current setup is an old MacBook Air, because my 2017 MBP is having its keyboard replaced. When I installed this MBA (3 weeks ago) I had to install the latest OF, and at that time it also asked me to login to my cloud storage. This makes me believe that OF is missing something – Otherwise Spotligt search should have worked by now.
Just to clarify my error I have attached a picture showing a Spotligth search, and as you can see, the OF result is not included.