Our son who is a similar age to yours is over the top on sticking to rules. He lives in Hertfordshire and worries about living close to Level 2 areas. We are in Devon and I suspect though we plan to visit in November having not seen them since last December he may well call off our visit as he protects his only son above all else.
You can't win and hard not to be cross with some people's behaviour but it doesn't help. Except many of us are very sympathetic.
The problem with your son being in America is Donald Trump's claim of it being nothing in the same way when Dominic Cummings here got away with flouting rules and people think so why can't I.
Baby Reindeer - anyone watched it?
34 year old assisted euthanasia