I came across this iPhone app the other day and its pretty slick! I havent bought the pro version but Im thinking that I will. Apparently someone has fully decoded the controls to be able to read and write these bms units in a much more English friendly way.
Edit: try this?
https://apps.apple.com/us/app/xiaoxiang-bms/id1375405426
Edit: try this?
https://apps.apple.com/us/app/xiaoxiang-bms/id1375405426