In response, we teamed up with five other families of first graders in our area, and have contracted with a tutor to handle the other three-and-two-half days of the week. We may switch to the remote learning option, since it seems like 75% of their class will do that, which would the benefit of in-person social experiences, but simplify logistics. When not in school, the five kids will be in a basement apartment at one of the families' houses with the tutor, working on their distance learning.
We still have a zillion and a half things to iron out, but it's both progress and ridiculous.