Why can’t I airplay to my Samsung tv anymore

I’ve used AirPlay for numerous apps on my Samsung qled tv for years without an issue. The last few weeks I’ve noticed it not working. I have a iPhone 15 plus. WiFi works, my Mrs can mirror to the tv. I use YouTube, bfbs, discovery+ and none of them connect anymore. This is an obvious issue that apple are ignoring because there are other posts on here regarding the same issue. I’ve tried all the steps suggested in previous posts.