OK, so I was looking in var/log b/c that’s where it is on every other *nix platform I’ve ever used. No worries. I do see the home-assistant.log file.
But I have another problem then. I installed the log viewer add-on and it is blank. No logs at all. I have started the add-on, and no errors reported in the log page for the log viewer add-on. But the log viewer page does not show any logs at all. I suppose that is a different question from the original, but I wonder if it has an easy answer?
I have no idea about the log viewer addon, but you can view your homeassistant logs in the interface under configuration > logs, or in supervisor > system > log provider