Well, I've been on 3 interviews so far (all at small community FM places) and each one stated they will interview the same number as any other year - typically 100. I also heard the same number of interviews will be conducted from my home PD. This makes me think your program is the outlier and that most programs don't want to deal with ranking twice as many students as previous years.
Regardless, it's clear that each program will handle this differently and I would suggest most students add 2-3 interviews to whatever they considered their "safe" number was pre-COVID