I haven't seen any real discussion of this, but am wondering whether the gender gap between boys and girls will grow as a result of school closures.
Every child is different of course, but talking to friends, it seems that parents of boys have in general had more of a struggle to get them to apply themselves during this period, and that boys are less likely to spontaneously pick up books and read, or write letters/stories/diaries. Boys also seem to be more likely to have spent a lot of time gaming during the school closures.
Gender gaps tend to be bigger in education systems where kids spend fewer hours in school.