iPad Pro external display stops working when unplugging usb c dock

Salutations ah_2023, 

You mentioned using a dock to connect your iPad to an external monitor, have you had a chance to isolate this by taking the dock out of the equation? Connect iPad to a display with a cable

Connect your iPad if it has a USB-C or Thunderbolt / USB 4 connector

On a model with a USB-C or a Thunderbolt / USB 4 connector, you may be able to connect iPad to a USB or Thunderbolt 3 port on the display.

If the charging cable that came with your iPad isn’t compatible with the port on your display, TV, or projector, do the following:

1. Plug a USB-C Display AV Adapter or USB-C VGA Multi-port Adapter into the charging port on iPad.

2. Connect an HDMI or VGA cable to the adapter.

3. Connect the other end of the HDMI or VGA cable to the display, TV, or projector.

4. If necessary, switch to the correct video source on the display, TV, or projector. If you need help, use the display’s manual.

If the display doesn’t turn on when you connect it to iPad, unplug it from iPad, then plug it back in. If that doesn’t work, unplug the display from its power source, then plug it in again.

Thanks.