I see that you’ve said you won’t be back op, but if you do see this, just take a step back. Worksheets don’t teach your child anything, they are just doing what they’ve already learned. Nothing wrong with that, but I’d imagine you want your children to learn over the next few weeks and months.
Enjoy your time with them. Read to them, listen to audio books together, set them challenges on things to make from Lego or play doh. Watch documentaries on YouTube, nextflix, the new Disney plus, etc. Let them help in the kitchen, yes you’ve said it’s a pain, but how will they learn? Paint with them, send them to your garden with a cup of water each and a paintbrush, they can ‘paint’ on the fence, paths, brick walls etc.
I’d imagine most children are feeling a little stressed and anxious, their world and routine of school has been turned upside down. Be kind to them and to yourself.
If you want worksheets, as others have said you can print them out. You will know what kind of level your children are working at, print some math things, reading things, handwriting practice etc. If you don’t have a printer, just get yourself some paper and copy things out for them, like sims or ask them to write a sentence or two about a topic you give them.