I now have my APO 2.0 working after the firmware problem of August 2025.
However, my app reports the oven is not connected. I disconnected the app, and tried to re-connect and it kept failing.
On a hunch, I disabled WPA3 security on my Eero 6 pro router, and the oven connected and I have a stable connection.
If you have the same connection issues with the APO 2.0 and also have a modern router with WPA3 security enabled, try disabling WPA3 and try again.
Obviously, this is not an ideal longterm solution as now none of my devices can use the more secure WPA3 wifi connection. I have submitted a support ticket and will report here if I get a response.