I’m having the same issue and posted the following on a different Apple discussion thread. I hope it’s not true what another poster wrote.

Tlainenich
User level:
Level 1
8 points
Dec 3, 2022 4:01 PM in response to J_Johnnyboy
Not sure if you’ve seen the comment below from one of the other poster's but if this is correct, APPLE should advise their consumers. Also, if you have an email address or phone number to someone that handles the APPLE updates, I would be happy to FaceTime them and show them in realtime what happens now when trying to watch specific aps after the most recent Apple update. Specifically, when I try and watch Cable tv through “My Spectrum TV app” I either get a black screen with sound or a picture with no sound that lags with each frame. I borrowed my son’s IPhone 11 and intentionally had him not download the most recent APPLE update and everything works beautifully- imagine that! The fact that multiple people are having this exact problem is not a coincidence. The sad part is I purchased the new IPhone 14 (on back order) hoping that may help, but evidently it won’t based on some of these comments. The comment I referred to below from another poster seems more plausible, but I would really appreciate clarification from Apple directly. If it is true, this would be a huge disappointment and I would need to research going to Android which I honestly don’t want to do. If the folks at Apple read these comments, I implore you to please fix this issue.
”I was on phone with an iPhone rep with and the rep basically told me that the new iOS 16 won’t work with HDMI any more due to content providers clamping down on pirating of movies and other copyrighted things. Apparently using an HDMI cable is how they do it and seems it will no longer be an option for people any more. People will have to now spend money on internet provider or hotspot to cast or mirror movies and tv shows now. That’s gonna get expensive. Hooking my phone into my tv in my big rig was a great way for a long haul trucker like me to watch movies on a bigger screen than my iPhone. No longer. The big corporations have spoken and they want more money under the guise of cracking down on piracy.”