When requesting approval for permission to access a user's full address, the card that appears in the iOS Alexa app does not provide any way to give permission. In fact the text it displays tells you to refer to the app you are already using.
Here's the full text of the card displayed within the Alexa app:
"XX needs you to consent to permissions. See the Alexa App for more details."
For any normal user, it would be impossible to know how to proceed at this point, or how to grant permission.
The permissions card is being generated with:
this.emit(":tellWithPermissionCard", Language.PermissionsNeedToBeGranted, "read::alexa:device:all:address");