1 — Once you are logged in you have to go to “Fiat and Spot” wallet.
2 — Once you are in your “Fiat and Spot” wallet in Binance select deposit BNB.
3 — In the Network field of the form select Binance Smart Chain (BSC).
4 —Copy the address you get from that network.
5 — On Metamask select send.
6 — Paste the address from Binance.
Beware! On Binance use the BSC network. If you don’t use it you will lose your tokens.