Update: I also got myself MBP 16 M1 - you can't profile it, you can calibrate it using fine-tune calibration feature, but just like I thought it's not needed. Out of the box it's as accurate as display for color critical applications, you just use factory defaults or set a calibration target in preferences.
You can choose P3, sRGB, PAL or NTSC color gamut, D50, D65, DCI or custom white point, BT.1886, sRGB or gamma TRC, SDR and HDR brightness, and it achieves it very precisely.
The display is perfectly uniform (max. 2∆E00 error), has perfect anti-reflex coating, insane blacks, and jaw-dropping HDR at peak 1600cd/m^2 as expected.