My HA install was on a Synology and in Docker, with a UPS so power outages weren’t a things. However the lack of WAN occurred a few times. It didn’t ever cause trouble, no matter what order it started up. What was the issue it caused for you?
I even got my Zigbee USB Stick working, you just gotta start the container once via the terminal on the synology and then I can clear it later to update it etc.