Hello barbrix2206,
To help us better assist you, can you let us know more about the issue you're experiencing? For example, are you connecting your iPad to a display using a cable, and are receiving an error? If so, what does the error say?
The above information will help us plan how to proceed.
Please also check out the information in this link, which explains the correct process to connect iPad to a display with a cable, depending on the display you're using, and may help: Connect iPad to a display with a cable
Connect iPad to a display with a cable
With the appropriate cable or adapter, you can connect your iPad to a secondary display, like a computer display, TV, or projector, where you can view the iPad screen.
To extend the workspace of your Mac by connecting it to your iPad, see Use iPad as a second display for your Mac.
Thank you.