Re: “Private listening” is MUCH more via iOS Roku app (can cast audio to any device)
I was able to split the audio using a $10 splitter for a hearing impaired friend. Wasn’t a Roku but I’m sure could do the same. I can think harder on it if this doesn’t give you enough ammo to try it out.
Roku Ultra 4660X software-version 11.0.0 software-build 4193 Roku Media Player 5.5.13