Yes, the Xiaomi 15 Ultra supports the NFC function, including NFC reading and writing card and NFC analog card function (Only supports HCE analog card).
For your reference, here is more information about the NFC function:
1. NFC stands for Near Field Communication, a short-range wireless communication technology that allows secure data exchange between devices within a few centimeters;
2. NFC reading and writing cards refer to the ability to read data from and write data to NFC-enabled cards. These cards can be things like RFID cards, contactless payment cards, access control cards, or smart tags;
3. The NFC analog card function on a smartphone refers to the ability of the phone to act as a virtual replacement for traditional NFC-enabled cards (such as transit cards, access control cards, or identification cards). However the Xiaomi 15 Ultra only support HCE analog card (Google Pay).
Note:
NFC functionality can vary depending on the region/country and market, so it's advisable to check the specific availability in your area.