I found something interesting with the WF1000XM4.
EQ within the Sony app vs EQ on the phone (AudioWizard) :
EQ within the Sony app : too aggressive I would say, it made the trebles too forward, thin making it too hot (but still acceptable for me), not to mention that metallic sounds, and it made the soundstage sounds small.
EQ on the phone (AudioWizard) : now we are talking, it surely opens up the sound, the trebles are getting some extensions while still taking a back seat behind the mids, gone those thin, metallic sound while maintaining those wide soundstage.
Adding my preference ear tips for the XM4 which is the Sedna Crystal (second place), my first options would be the Tanchjim T300T and the third would be the Final tips for TWS.
Talking about LDAC. I always use 990 options but only with the cellular data on, I found it very stable even in malls (it rarely stutter), once I turn on the wifi or location the Bluetooth connection becomes unstable but maintaining solid data connections, I'm using Rog phone 5 btw.