I know it is a bit confusing.
With Xiaomi we mean the new Xiaomi protocol, not the manufacturer which used the Huami protocol before.
So for the mi band , the Mi band 8 is a Xiaomi device. Previous bands were Huami protocol.
If you look here
https://gadgetbridge.org/gadgets/wearables/xiaomi/
All devices saying "requires Xiaomi token to pair" is what we call Xiaomi: in changelog.
I know - confusing.
@gadgetbridge thanks for the explanation!