Yoroi / Ledger S

Hi

Hope someone can help

I initially created my Yoroi wallet with my ledger S which means that I didn’t get a seed phrase due to the fact that it’s obv in the ledger, now I am trying to use yoroi on my ios for read only, I have done it before but can’t remember how I did it as there’s no option for read only and don’t have any seed phrase what do I do ? Hope someone can help