Just took delivery of a Viltrox EF-EOS M2 adapter and tried it with my Sigma 12-24 DG.
Here is a screen shot where ML reports 8mm, when I'm at 12mm, and my DoF Bar shows all the right stuff, eg:

* I'm focused at 1.51m and at an aperture of F/5.6
* The near DoF is at 45cm with a focus blur of 19micron (as I have diffraction aware on).
* As I'm focused past the hyperfocal, DoF Bar is reporting I have an infinity focus blur of 8 microns, that diffraction is contributing 7 microns to the over all blur, and that the quadrature total blur is 10 micons.
I'll keep on experimenting, but it looks to be a success so far

Cheers
Garry