I noticed the same thing. COVID and at-home-Zoom schooling has been an eye opener about the curriculum for my seven year old. When I have a work break, I occasionally sit in her learning area and watch. She's so bored as they again and again go over subjects she already mastered last year. She learned how to open another window and tile them, so now she does her entire slate of homework in parallel on the side while the class re-does single-digit addition because a few kids still don't know it.

Not sure how much of this are special challenges specific to remote learning and Zoom and how much of it is just that the curriculum has to be tailored towards the slowest learners.