Ok.

It seems I missed the access tag. It looks like a private parking for staff only to me. It shouldn't interfere with the routing/footways; with some common sense we can assume customers/visitors can still walk on/around the parking area. What do you think?
(I assume there's no explicit non-staff i.e. destination/delivery parking.)

I've added the part of the footway which goes around the outside of the yard in
https://www.openstreetmap.org/changeset/138296142