Thanks for looking into this! I ran the Raspberry Pi imager on NVMe in a USB enclosure, then installed the NVMe in the HA Yellow and booted. I went through the initial setup (create an account, choose timezone, etc.), then shutdown, removed the NVMe from the HA Yellow then put it back into the USB enclosure, then plugged it into the RPi…
(I found that the directory structure coming straight out of the RPi imager was wildly different from that of my old NVMe, so I didn’t think it made sense to just copy configuration files in that state. Putting the NVMe into the HA Yellow and running the first boot initial setup flow changed that…)