Most anarchists were indeed social distancing, masking etc. so I have no idea what you are talking about. Maybe you are mistaking somehow anarcho-capitalism for anarchism, even though it's not anarchism?
The only bit of evidence from Graeber apart from the linked paper was that he did go on vacation in 2020 around the time when many people might not have left their house, and when many people were forced by the state not to travel. This was of course before the vaccination issue. The paper seemed to indicate he viewed it as temporary and one that would provide lessons to people. Do anarchists hold the latter view now? What are these lessons? Is there reflection on the range of views and any conflicts it showed?
I find the range of responses given at the time when it was going on interesting and reflect the conflict between collective responsibility and freedom.