Ignoring all the misinformation floating around on the Internet and Social Media, regarding the effects these lockdowns are having on young children, I can speak from Experience. We have 4 Great Grandchildren, ages 10 thru 16, and this pandemic and the interruptions to their schools and daily lives has been quite stressful for them...And their parents. We have all pitched in to help them try to maintain some degree of normalcy and scheduled extra activities for them to keep their minds off not being able to mingle with their friends and attend normal school classes.
We, and our adult kids, regularly bring them to our places, and take them shopping, staying overnight, and any other things that they like to do. Our oldest will be staying with us for a few days this coming week, and we will probably be running around quite a bit.
Having support from the whole family seems to be helping them stay focused, and not spending any time brooding. Our local schools are planning on reopening for in school classes in a few weeks, with some modifications to classroom sizes, and possibly some "mask" requirements, but just being around their classmates and friends will probably be a big help.