Any major manufacturer make office AMD machines?

I am struggling to find OEM AMD machines, I am only finding ones built by small companies that bought parts off the shelf (or by individuals).

I want to replace an aging Xeon machine we have (we bought it used in first place) with a new AMD machine, but not finding any major manufacturer (that we can trust they will have professional support) that sells AMD Machines.

Dell for example have AMD Machines but only geared toward cloud and HPC, being rack-based omputers or "normal" computers (ie: not a microcomputer, but not big as a mainframe).

I wanted just a tower atx microcomputer with AMD but not finding any, except for "gamer" machines full of neon and other distracting things that would get in the way of the machine being an office server and "hand me down office desktop" in some years.