Mostly in lowercase, especially when talking about apartments or houses

Same in Italy, mq.

Like we need another overload of "kvm"

(Kernel Virtual Machine in Linux or Keyboard Video Monitor in server switching kit)

I’m more used to seeing “m2” on mobile, but it’s probably different between regions.

More people seem to find the ² on mobile keyboards than they do on desktop keyboards. It's still rather uncommon, though.

If anything, I would've expected phone keyboards to turn m2 into m².