I don't have the
M2P. however what matter's is the devices app processing capabilities.
For my MP I use a
Crystalsky Ultra during normal daylight hours, or I use the
DJI goggles. Otherwise, an ipad (I use ipad
mini 4) while under a shade tree is good. Also, flying from within your vehicle works surprisingly well, and any level of brightness will work.
If I fly in the morning, late evening, or night, the ipad
mini 4 works great.
What matters most though is the monitors ability to handle the DJI Go 4 app. Many people claim to have success with Android devices. I have not. Previously, I had not ever used Apple devices. When it comes to flying a DJI drone, I will only use Apple
In the past, DJI Mavic Pro boxes stated explicitly that they were "made for iphone"
If you don't struggle with small screens, you can use your phone and swipe up the screen with your fingers removing the telemetry; thereby increasing your phone's effective screen size as is shown in this video regarding tips and tricks of the app
Hope this helps