I just saw what the issue is, Those are UVs generated properly by the tool, as their layout is horizontal on 1 row of the UV.
However it is on UV channel index 1, but in your material you are using TexCoord with Coordinate Index = 0. Simply changing Coordinate Index = 1 in the TexCoord expression, like the UV Channel index where the UVs were generated, will solve it.
Cheers.