I don't think you are being unreasonable, but maybe you are a bit jealous
. I am saying this with sympathy, as my son and his family are spending Christmas with his in-laws, and he sees far more of them then they do of us (for reasons of distance).
Part of me completely understands. They don't want to be driving (if they are able to do so because of lockdown) for hours at Christmas, and DIL wants to see her parents. Another part of me wants to sulk, and point out that the in-laws live a ten minute drive away, and they see them more than once a week. Coming to us for Christmas would be a lovely compromise, and it's my birthday on Boxing Day, so I'm likely to miss seeing them then, too.
I am forcing myself to bat away the sulky voice and listen to the more reasonable one. In any case, things might mean that visiting is impossible this year, so no point in worrying about it now.
I hope you have a lovely Christmas, and that you can see your daughters soon afterwards. You will gather brownie points if you are understanding about it - it can be quite tiring for children to be travelling about over Christmas, and little ones just want to be at home when Santa has been.