In my detached shop, I did 2x4 treated sleepers on the flat with XPS foam between, a vapor barrier, and then 3/4 tongue and groove plywood subfloor on that. I dumped some High Performance Topcoat on it as a finish. In my case I knew I had a moisture problem, due to how wet the slab got in the summer even under the anti-fatigue mats, and being in MN the floor was unbearably cold in the winter. I'd maybe like to put a layer of cheap hardwood flooring on top as some of the machine wheels dent the SYP plywood, but for now I'm content with fixing the climate control problem and not having my back ache constantly while out there.

Not sure if your new build garage floor in would have a vapor barrier under the concrete. It's pretty standard in living spaces now but unsure if required for a garage. In FL I would want to make sure there is one somewhere in the system though, especially if you are conditioning the air in the shop.