Came across this:
Thanks a lot, @ValdikSS
I mean flipping just a switch in bluetooth settings to transform the sound to HD in SBC? Wow!
I think you need to put this info on top of the first post for kiddos asking you to patch their ROM:
"Lineage OS 15.1 and above builds from 31 March 2019 all have this patched in. Enable HD Audio: SBC for individual Bluetooth device in settings."