DS is in year 3 (I think? We're in Spain, he's 8.5 yo).
He'd do the set schoolwork through gritted teeth. We'd always start with the English and maths as they're easy for him (particularly the English, lol! Lots of 'match the clothes to the noun').
Most of the work was mini projects, combining writing, maths and creative thinking, some art. We did, overall, about 90% of the work set. For example, he had to design a circus big top, draw where the seats would be etc, totally boring and he doesn't like drawing, so he made it out of Lego as a compromise, it had trapeze artists and contortionists, it was fab and he enjoyed it much more. Anything artistic I did with him as DH can't draw a straight line!
School term finished on 19th June, and I've been doing an hour a day with a maths book and a specialised year 3 activity book which is excellent and he likes doing it (it's a trip around Kenya, so far he has had to write down 10 African countries and put them in alphabetical order, calculate the price of various things you put in your suitcase, how much change your get back from €40, wordsearch, write an email saying how your trips going, etc). It's a lovely wik book and he's actually enjoying it. I'll be sewing it ironing, he'll be working. I think he likes to have me near, but not breathing over his shoulder.
So now it's summer, he does about 1 hour a day on that and some reading, 30-60 minutes, some during the day some in bed at night.
During lockdown, both DH and I were working from home. I went back to work at the end of May, but my summer hours have been cancelled so I'm on the dole until October. So I have more time to do fun things with DS. Most days we're on the beach or he's out on his bike with the dig, sharing ice creams!
He is somewhere in the middle of his class, not the brightest and not struggling. We get him to read signs etc when we're out and about, menus and wotnot, get him to help us pay for things by counting cash, asking him how old our 4yo dog is in dog years 
There are many ways to keep kids engaged and interested without resorting to worksheets, but it depends on the child.
When they all go back to school there will be children with very different experiences of lockdown. We've been very mindful of DS' mental health more than schoolwork. Here we had total lockdown, no one allowed out at all (we are lucky to have aforementioned dog!), so he didn't actually leave the house for 2.5 months and had anxiety attacks. Now he's much better and I've made him some masks out of funky fabric and he has been to the beach with friends, so life feels more normal.
God what a ramble 