When I last lived in the area (pre-pandemic), Garden State Plaza itself would be open on Sundays (the mall has a bunch of restaurants and a movie theater), but most shops would be closed. And it extended beyond electronics and clothing -- most consumer goods would be unavailable on Sunday, and there was always a puzzling list of exceptions (for example, cosmetics could be sold, but paper notebooks could not).

Can you get Amazon same-day delivery there, or is that also restricted?