I'm using a TCL Roku television:
Device ID #J598CP053806
Software: 11.5.0 build 4312-30
You asked for a tracker ID; when I tried hitting home five times and then back button 5 times, nothing happens.
I am using an iPhone 12. This entire problem started when I upgraded to ios 16.3.
The problem is simply this: I am using the Roku App (Official), acquired from the Apple App store. Once the App acknowledges the TCL Roku TV, and my Bluetooth settings are on, I turn on my Bluetooth headphones and press the "headphones" on the App's remote control. Normally, I'd get sound; but since I installed ios 16.3, the selected "headphones" button (with a little green light showing it is "on" or selected), turns off after about a minute and never gives sound through the headphones.
I have an older tv in the other room that uses a separate Roku box; the Bluetooth headphone setting works perfectly there.