Wow do I feel sheepish for not figuring this out sooner. I have a 2022 27U and it came with the FireTV and standard AX8000 (i think) head unit. I was a bit annoyed that the TV wasn't connect to the stereo and we had to use the built in TV speakers.
Well today, it dawned on me that I could Bluetooth connect the two, and now I have surround sound.
Makes me wonder what other tips I may be missing out on.