You just had an entire planet told that they were going to stay at home, and that school-age children needed some type of device to learn through. That must have driven some percentage of new sales.
Not to mention things like Bowdoin providing iPad Pros with Magic Pencil and Magic keyboard to all their students (plus paying for cellular connectivity for those students who need it). I imagine this is going to have a knock-on effect where this becomes a quasi-standard setup for remote education improving Apple's bottom line going forward.
https://www.bowdoin.edu/news/2020/07/bowdoin-to-provide-ipad...