I installed Flex per @AndrewLarsson and entered the name of the app that was detecting the external display.
I then went under
UIKit, then searched
UIScreen and returned
When I tested it with my AV adapter, the app did not know that there was an external display connected!
Many thanks to @AndrewLarsson for his help! Without it, I couldn't have figured it out.
UPDATE: False alarm. It wasn't working. I had gotten overly excited and missed the fact that IT DIDN'T WORK!!! I'm really sorry about that...