I had a similar issue on one of my HA instances but found a different solution.
I’m posting it here to an old thread in case its able to help someone down the road.
Firstly, I’m running supervised HA in docker on an RPi Model 4 running Bullseye.
I tried all the suggested solutions but none worked, so then compared the HA install with the issue to another one that does not have the issue and I found that /etc/systemd/system/systemd-journal-gatewayd.socket.d/10-hassio-supervisor.conf did not exist on the system w/ the issue.
I created the /etc/systemd/system/systemd-journal-gatewayd.socket.d dir
and then created 10-hassio-supervisor.conf with the following content
[Socket]|
ListenStream=
ListenStream=/run/systemd-journal-gatewayd.sock
After reboot the repair went away and I was able to view the host log in settings->system->logs