Is your belt rubbing against the sprocket rim? I’ve heard that squealing is attributed to it rubbing against the gear rim or there is some fine particulates/dust between the teeth and belt. Dropping the wheel, remove the belt, clean the teeth, and realign might fix the issue. I’ll be doing just this soon to check. My 2nd LiveWire was fine until I changed the rear tire - instant squeak. I also notice if I ride on a dusty road it eventually starts squeaking after a while.