xm3 was sitting idle from the time I bought as I didn't like boomy sound with too much of S's in the highs. also the fact that I cannot change equalizer without affecting LDAC. Now I came across an app called 'wavelet' where it has autoeq feature to tune it to harman target curve. I tried that and now xm3 sounds wonderful. In fact I tried this with Momentum True Wireless (which was also lying around as I didn't like sound signature) and even that sounds wonderful.
yup, Wavelet has become sort of a "secret (not so secret) weapon" app to have for bluetooth earphones users. the auto eq on the WH XM3 really sheds the boomy-ness of the sound. i really like it. i also use wavelet for most of my TWS