They will not, most people never receive
If you never received the appointment when your case was ready until now then you will never receive it, and no they will not cancel your interview.
please go ahead and click yes and schedule an appointment, (which is another hustle because you have to wait for slots to open, which could be anywhere from 1 week to months). We have a WhatsApp group with members who have gone through the process and now helping those who are in the process, your fiancé can join it.