It appears to have three 160mm fans in the front, behind the grille. Should be enough for the M2 Ultra

It isn’t made for a datacenter it’s made for a studio. Studio equipment is often rack mounted so being able to put the computer in there too is great. And the case isn’t new it’s the same as the 2019 Mac Pro.

I don't think apple ever officially claimed the trashcan mac pro could be rack mounted, those are kits provided by 3rd parties.

But the 2019 mac pro did have an official rack mount variant of the case.