Many writers have had a difficult time writing during the pandemic. It's not surprising, really, between the anxiety and uncertainty, the disruption in schedules, and wondering how ongoing plots and settings would be affected by this turn in history.
Others dug into their manuscripts because they had more time or space, or fewer distractions, or needed the escape. The two manuscripts I worked on the most during this time barely mentioned the pandemic--especially the one that occurred mostly during the 1980s!
We are still reckoning with COVID19. So much of what we've been through in the past two years, we haven't yet been able to process and put into perspective. And there is still uncertainty ahead. I remember a similar reckoning after 9/11. Not only did we have to rewrite the landscape of New York, DC, Pennsylvania; not only did we wonder what might be next (anthrax, it turned out); not only were there new airport procedures and building-security rules; most of all, we had to look at how these events affected our mindsets, viewpoints, memories, plans.
Things are always changing. But sometimes they change more suddenly, and it takes a while to absorb the new world.