Did you find a work around for this? I have noticed that when converting the room's to JSON, the room identifier is omitted in most cases, which doesn't help!! I tried using a UUID in the name of the various JSON files, but once the array goes into the StructureBuilder, like you said, the room's no longer match. It's very frustrating!

I've looked into this a little more and I've noticed that window, door and floor identifiers seem to stay the same across the structure builder, so it might be possible to identify a room using a floor identifier? I need to explore this more.

I found the solution! The operational dataset was fine, but I made a mistake with the chip-tool. When using the dataset as one of the parameters, it must be prefixed with "hex:". I was missing that. I was successfully able to add my ESP32-H2 into the Home Pod Thread network.