I have the same problem. I thought it was a problem with my TV model, but I made sure it worked on the same model that other people had.
So, I thought about whether it was an iPhone problem, but the same symptoms were found in other iPhones, Macs and iPads.
I inquired into Apple and Samsung but couldn't solve them. However, Samsung said it will make an update around the end of May, but I don't have much trust because it is probably the wrong explanation to inform of this update.
Because the answer is that airplay will be activated through the next update that will be released at the end of May.
It is questionable whether he gave an answer with the right knowledge.
Most of us are already active and the problem is that we can't connect.
I've also tried several options for key generation in an already active airplay setting on TV.
I thought it was a problem with setting up a network share, so I tried everything I could think of, including wireless connection, wired connection, 2GHz, 5GHz mode, network initialization, and replacement to another network shareer.
I think maybe it's because of an unexpected problem, but now I can't think of any more experimental methods to solve it.
As Samsung said earlier, it will be updated at the end of May and I think we should wait until then, hoping that the update will solve the problem. But as I said earlier, I wonder if the update will be made.
