High definition sound on one device, but not in the other

I know iOS does not support ldac but the option for my realme buds air 6 pro was available in my main phone (11 pro max) until a week ago. It has been there all this time and still is available on the 12 mini and it made a bit of a difference to the sound. I would love to see the option back on my phone but unfortunately i cant. I tried reinstalling, resetting the buds, restarting, but my main phone still refuses to show the option while my other phone does.

Also my main phone had been dead for a few days because i stopped using it and used the other phone to log into realme link and use. And when i brought my main phone out i couldnt see it in there. My main phone is on iOS 18.2, while the 12 mini is on 16.3