Whilst in the guidance it states that children should be sat at tables facing the front as a possible way to keep them safe, the schools guidance says that the safety measures for older children are not the same as for younger children. This is the key to what you are asking here.
The guidance also states that you still have a responsibility to provide a full balanced curriculum including the characteristics of effective learning which remain statutory. How this would be possible in EYFS by keeping the children at tables I'm not sure.
NHS guidance also still states that young children should not be inactive for long periods of time and that children aged 5 should have 180 minutes of activity per day.
The thing is, you have to balance the risk with all the above. If you're able to keep the children in a bubble, as I'm sure you're already going to have to anyway, then there is no need to have things set up any differently to normal - with the resources just needing to be cleaned more regularly.
One thing I said to my wife who had to get her point across to the head who was asking the same was, if they are not willing to change their approach, then state that as an early years teacher, you can not see how it will work and that you will need them to teach the first day to model to you how it will work. I'm sure after that, they will change their minds!