The one problem I did have after the change is that a few weeks ago I connected my SA via an ethernet cable to my router as I was a bit tied of the slightly flakey wifi signal and dropouts. In the meantime my router had assigned a different IP address to it.
I also had static IP assignment for the SA Pi which was being ignored by my router. But after a reboot my SA to HA MQTT was not working, and I had something similar to what you experienced, nothing was available in HA.
It was the IP address used by the MQTT set up in HA. My router had reverted to using my originally assigned static IP address for the SA Pi.
So in the MQTT settings (choosing
Configure from the MQTT integration card in the Device menu) I changed the IP address back to my originally assigned static IP address and it all came back online.
View attachment 119670