So, when I first purchased the tv last year I had an iPhone 11, which would mirror with tv and connect with Airplay just fine. As soon as I upgraded a few months later to an iPhone 12 mini, it would not connect to airplay or mirror to the Roku tv. The phone searches but the tv never pops up to be connected to. This also happened to my mom when she upgraded to an iPhone 12.
I’ve tried everything- same Wi-Fi, resetting, etc.