how can i transfer from my bitcoin wallet on my iPhone to my nano s
1. Keep in mind that the coins are not in your bitcoin wallet and will not be in the Nano S. Both wallets only handle keys.
2. Create a new seed on the Nano S, write the seed also onto the backup papers, install bitcoin wallet app onto Nano S, open a wallet software associated with Nano S (I use Electrum on desktop, but I guess that you can also use ledger live) and get an address from the wallet associated to the Nano S.
3. Make a transaction and send the coins from your current wallet to an address associated to the Nano S, wait to see that confirmed.