4. Mac M4 display connection options

Apple has changed the Thunderbolt on the M4 Macs and it seems that is not 100% Thunderbolt backwards compatible, causing many devices to not work as they did with previous Apple Silicon Macs.

The MP Controller's display does not receive a video signal when using Thunderbolt on the M4 as it did on previous Apple Silicon Macs.

You should use an HDMI connection and USB-C (Thunderbolt or plain USB or USB-A if using a docking station) for the touch data and for providing power to the display. 

You can optionally (recommended on Model 2A) also use the additional power port using a wall adapter to provide power to the display so that it draws less power from your Mac.

If you need an additional HDMI ports you can use a USB-C docking station like these offered on Amazon.