Please do not use this to put blame on all jewish orthodox communities.
I am a totally non-religious jewish atheist. However, my lovely eldest niece belongs to one of these communities in North West London. Usually a couple of times a year, my eldest daughter and myself visit her on a Sunday morning to catch with her and her children and g.children - my last link to my (many yeas my senior) brother!! Despite our many cultural differences we all really enjoy and look forward to these meet-ups. Obviously, has to be in her house, as she would not be able to eat or drink in our non-kosher homes.
Sadly, last April, her husband was taken ill, rushed to hospital in the Jewish volunteer ambulance, stayed five days before he died having never been able to be seen or see his family. We were, of course, unable to attend his funeral.
However, during the summer when rules were lifting, I made a provisional arrangement for us to visit her for a couple of hours. She was so excited and pleased, but then contacted me to say it would not be possible as with her, me, my daughter - if either of her adult children joined us with their children we would be over the six permitted for meeting indoors. So, yes, she was absolutely obeying the rules.
We speak on the telephone, but a present no idea when we will be able to see her and express, in person, our regrets for her husbands death. She, and her brother were the first two g.children for my parents, and were so deeply loved by them,.