Thanks for your insight and the explanation Richard.
I thought it was about the airport being closed but looking over Internet, I did not find any info about their closure. That would be great if somebody @CanIFlyThere could update the MSFS airport list with this info.
Unfortunately, by trying to verify the integrity of my MSFS Steam folder, it seems I’ve deleted all my MSFS packages. Not sure how this has happened. So in the end I’m good for a reinstall… Great… 