Sorry but I think you are being a bit over the top.
You should get out with your dc. You are perfectly 'safe' to go outside. Why keep them cooped up. Inside under the guise of being safe.
Yes it's a bit boring, yes we need to try to follow the guidelines, but it is ok to go out when necessary. They might hate walking but exercise is essential.
You would probably think I am disgusting. Yesterday ds met a friend and went to the park, then when he got back we all went on a walk with the dc on their bikes.
Today we've all been to the dentist, then went to the supermarket for lunch supplies, I treated youngest to a toy which they were both promised for doing chores, going to make pancakes later.
Tomorrow will be walking, playground and baking cakes.
Thursday crafts and a movie plus more walking/cycling.
Friday I am going to treat them to a McDonald's.
In amongst all that there will be a fair bit of screen time, exercise videos on YouTube, housework, playing with toys but I don't feel one tiny bit of guilt for going to a shop or park.