You have to setup a lightning wallet and add that address to your profile. From the lightning wallet you can send #bitcoin to your cold wallet (and vice versa).

You can think of it as:

lightning wallet = regular wallet

cold wallet = bank account

But don’t listen to me only. I have yet to set up my cold wallet. However, you do need a lightning address in order the get the zapping ⚡️ experience - that much I know. How you then move those sats between the lightning network and the cold wallet (if are inclined to do so) I am not sure of.