Icon that looks like a tv screen pop up on the top right corner of my phone
I own an iPhone 7, and i just had this icon pop up on the top right corner of my phone that I’ve never seen before, I am trying to figure out what it is with google etc asking friends but, no one knows what it is :(, it looks like a tv screen with an arrow pointing into it, i don’t know what or why it’s there, I don’t own an Apple TV and I don’t know if it’s something to do with pairing or whatever, but I have no clue as to why it’s there, if anyone knows what this is or might be let me know how to get rid of it!
[Re-Titled by Moderator]
iPhone 7, iOS 12