I'm sorry to hear that you have to be vaccinated in your country to go to the market. Here in Canada we need it for restaurants concerts and sports events. So far we can get food. I will not be able to go anywhere again because I will never get it but I understand how you are backed into a corner.
It's such a nice thing that you had a lovely picnic. Picnicking is my favorite thing to do when it's not cold.
All the best my friend!