Screen mirroring to LGTV from iPad Pro
I'm rying to activate screen mirroring from iPad Pro (17.4.1) to LGTV. The TV recognizes the iPad but programs won't run. Do we need Apple TV to make this work?
iPad Pro (4th generation)
You do not need Apple TV to mirror your screen to the LG TV. It sounds like you were able to enable Screen Mirroring using the Control Center.
Use AirPlay to stream video or mirror the screen of your iPhone or iPad - Apple Support
Some content is protected and will not allow you to stream to the TV. For example, you may not be able to Screen Share movies that you watch on Netflix. Any app without protected content should work fine.