[dataworm]

The M2 MacBooks should also get that because the hardware supports it. The M2 Mac mini allows to connect 2 displays over USB-C if you don't use the HDMI port.

[kayodelycaon]

The M1 mini could connect 2 displays as well. I'm pretty sure one of the two display controllers in the laptops is hardwired to the internal screen.

[dataworm]

It could but only if you connected one of them to the HDMI port. The M2 allows to connect both over USB-C. One of the M1 display controllers is hardwired to a DP output which goes to the screen on laptops and iMacs and to a DP->HDMI converter on the Mac mini. The controller isn't hardwired anymore since the M2, only the output is.