This is so weird.
Like the hardcore preppers who've suddenly found a need for their stockpiles, suddenly my least enjoyable superpower is the one everyone needs.
Seriously, you get used to being alone.
Not sure what I can share about coping, though. I suppose:
• look for replacement activities rather than just mourning inability to do usual activities;
• get tooled up and trained up NOW with technologies which will help folk keep in touch
• think about what's important to you (eg enjoying a relationship with a grandchild) and plan how to get as close as possible to that result but in a different way (eg Facetimed bedtime stories – even pre-recorded bedtime stories on an old cassette tape. Parents could record footage of child enjoying story...).
• accept that it will be unpleasant at times, have a mope, and get on.