Hello DJI is it possible to add 10-bit colour in Mavic Air 2?

It should be capable. Hopefully.

They would rather you buy a Mavic 2 Pro for that.

It is only a piddling little 1/2" sensor out of a phone, not justified.

I think we're more likely to see them add video profile adjustments like Contrast/Saturation/Sharpness. I think this is more important than them adding 10 bit video and further cannibalising the Mavic 2 pro.

It has D Cinelike for that instead and it seems quite capable.

PS, there's a comparison here of the Air 2 D Cinelike to the Pro 2 and there's not much in it.