Hey i own a note 9 and 1000xm3s too, all you have to do is go to the bluetooth setttings and tap the settings symbol to the right of the 1000xm3 and it was have an option to turn LDAC on or off. Turn it on and then check the developer options, it sets everything to max settings except best effort, switch that to 990 kbps everytime you reconnect the headphones. I couldn't figure it out either lol it was definitely an AHAAA moment lol
She can't even use high quality audio without this setting turned on, nobody with the 1000xm3s or note 9 can unless they change this setting people need to understand this soon
Also Audio-affinate here. got the Beyerdynamic Amiron wireless at home. those are specialized for Aptx HD.
Although i really like the Note 9, i'm thinking of switching the brand as neither an update comes, nor the possibility to install it on an easy way.
the new note 10 (without a chinch even) doesn't have aptx HD either. Seems i'll switch to a used one from sony or LG.
It would be enough to just have an Update-possibility without root. as that won't come, well, samsung misses out on a not too small variant of customers (and advertisement, as those will deny the otherwise good quality)