still not work and no support
Have you used P2P exchange in the Binance?
It seems the other BNB are locked if all suggestion above still doesn't work it might be locked and maybe you trade recently with P2P and then you didn't release the asset?
That is why the other BNB does not show on the OTC portal that's what I think the issue why it does not show the whole amount.
BNB under wallet overview
If that's the image, it was a bug because there is a weird thing under fiat and spot wallet on overview. Mine even I have BNB in my wallet it doesn't show BNB on that place look below
