Oh dear, he really sounds out of sorts doesn’t he?
He doesn’t want to be in the UK, or France, but he wants to be with you!
You need to ask him what he suggests and then get on with your life and let him sort himself out, you can’t be responsible for making him happy all of the time, he’s not 5, he’s a grown up and needs to act like one.
Hopefully he will get over it, we are all constrained at the moment and have to find ways of keeping ourselves occupied and amused.
Passports not in the drawer I always keep them in. Turning the place upside down.