This is an equirectangular render (360x180 deg) from a photogrammetry model I processed for a friend… sorry, can’t show you anything bigger than this.
The obvious is standing right in front of you… you don’t just have a room, you have a room and several objects so you aren’t going to get a good model of everything using a strategy for an “empty” room.
14mm rectilinear lens, multiple camera heights … at least 2, probably 3 for a shop where they stack things higher than “normal” rooms… 50cm, 1.2m, 2.2m high… and a bucket load of shots. Depending on the free space between displays you’re looking at a camera spacing of at most 50cm, probably less. AN additional set of images shot along the free walking areas looking down at the floor, and a grid of shots to capture the ceiling/upper sections of wall. If you want better details in objects displayed on tables then you’ll need to treat each table as a large object and shoot accordingly.
I try to teach people to think about their shoot purely in terms of the surfaces they want to capture and then shoot for that.