I discovered a new option that allows you to use a Mac computer with an iPad in a teleprompter. 

You can use Duet or Sidecar (Sidecar only if you’re equipment is newer) to turn your iPad into a second monitor. However, it doesn’t allow you to horizontally flip or reverse the screen so that you can read text in the teleprompter’s mirror.

But a Portland based developer has built a $15 tool to make this happen. https://avatron.com/get-air-display/.

I’ll update this post when I’ve played with it, but for now, I wanted to get this out to the world because there is so little information about mirroring (as in flipping or reversing) an image onto an iPad.