When will NFCReaderUsageDescription be shown to user?

NFCReaderUsageDescription - Xcode Name: "Privacy - NFC Reader Usage Description”.


I included the NFCReaderUsageDescription key in my app’s

Info.plist
file and provided a purpose string for this key.But the purpose string is NOT displayed as part of the alert like other privacy keys. Indeed there is no alert before the NFC Reader session running. If anyone know when will NFCReaderUsageDescription be shown to user? Thanks a lot !