How to convert "Trimmed Surface" to regular surface?

I’m trying to do create a “complex” surface and create some panels on it by using Lunchbox paneling tools. The surface was initially created with SubD tools, then converted to NURBS, then it was rebuilt using a lot of points with a patch command.
However, one I try to apply paneling with Gh, the surface gets recognized as a “trimmed surface”.
Is there a way to somehow convert the trimmed surface into a regular surface, so Gh can recognize it as such?
Harbin srf 01.3dm (504.9 KB)

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