I have two university students and two high school students who've been studying online from home since March. Our schools and colleges here didn't really cut back on the workload for students, so they've had a lot of experience of it now.
The schools did a mix of Teams video calls and assigned work. The kids took part in all the video calls as required by the school, and had occasional online 1x1 sessions with their tutors or teachers.
The universities also did a mix - my two kids chose to take part in some of the courses on a synchronous basis and others on an asynchronous basis. It really depended on what they felt worked best for each course eg, DD did all her math and computer science classes asynchronously but her Spanish and history classes were all done via Zoom classes because they were much more interactive.
They responded pretty well but they did have bumps when they got behind, or felt overwhelmed and weren't sure how to feed that back to staff, or misunderstood what work was expected and had to redo some of it.
Because it was such a new challenge, all of the schools/colleges went with pass/fail for that period, rather than giving grades.
I made no attempt to keep the college students on track, other than providing food and hugs when they were really stressed. DD did get VERY stressed by the end, but she passed everything.
For the high schoolers I did occasionally review their workload with them, and once or twice I helped them engage with their teachers and took part in some email conversations and one phone call. They also passed everything although it was a bit touch and go for DS.
For the upcoming year all of the schools and colleges are reverting to giving actual grades, so they will be expected to both keep up with the work, and find a way to give feedback to the staff when it's difficult or too much.