https://wccftech.com/how-to/ios-13-ipados-screen-mirroring/

Here's how you can use the Screen Mirroring feature in iOS 13, iPadOS running on an iPhone or iPad.

Apple has this weird and wonderful habit of moving a few things around with every new software update for iPhone and iPad. Thankfully, when it comes to Screen Mirroring, Apple has managed to keep its foot on the ground since iOS 11. And if you are wondering how you can cast your iPhone or iPad's display onto the big screen using an Apple TV or a compatible AirPlay 2 television set if you are running iOS 13 or iPadOS, then follow the steps below and you will be in business in no time.