How does using my credit card through the Wallet app appear to the merchant?

I thought adding a card to the wallet app would mean you can just tap with your phone instead of the physical card and it appears identical to the merchant as using the original card. Through further research I learned using Wallet in reality uses Apple Pay which provides a unique Apple Pay number, and possibly other personal information inputted into Wallet. This thread on Apple Forums states Postal Code, Shipping Address might be shared. (see [Does Apple Pay share cardholder name or billing address with apps, websites, or merchants?](https://discussions.apple.com/thread/253453334)) But I can't find this information on Apple's own page about [Apple Pay security and privacy overview](https://support.apple.com/en-ca/HT203027) . Instead, they vaguely state: > along with additional information needed to complete the transaction Apple Pay's marketing repeatedly states how it protects your privacy, but it seems it's capable of sharing more information than a simple card tap would (Card number, Cardholder name, and expiry). I'm wondering what else Apply Pay could share potentially share as "additional information". Could phone Number, and Apple ID Email also be shared? Under what circumstances is information shared?