Granted, I don't see a lot of offices, but everywhere that I have seen seems to be choosing docking stations or USB-C enabled displays (Dell has an excellent selection of those) and some kind of business laptop like a Precision or Elitebook.
Incidentally, those same screens are used for the staff who have Apple computers, and, largely, those are laptops too.
Desktops seem to be practically dead except for workstation-grade ones in the businesses I've been to.
Workstation-grade, I'd say, is extremely limited and shrinking fast. Particularly outside of the tinkerer niche. Think "gamer", even if I suspect that actual gaming isn't half as big in that niche as marketing approaches would suggest. But in any case very much not-Apple.
Any cubicle farms, like call centres.
University labs, Hospitals.
The employees would never work from home (outside of a pandemic) and work set hours.
So if desktops costs less, they will of course be used here since there is nothing to be gained from paying extra. Similarly, these users would not be using pricier Apple products.
This isn't quite true, the call center at my Co. is partially remote for call center staff, they use jabber and other VoIP connected to their PC's to work from home.
For example, do MacBook Airs paired with external monitors perform better than traditional PCs? If not, are people opting for MacBook Pros with docks instead? And if so, is a top-tier MacBook Pro with an external monitor and keyboard actually cheaper than a Mac Studio setup?