pybind11 + pydantic

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Problem description

I want to use classes generated through pybind11 for pydantic basemodels but I'm having trouble getting that to work.

pydantic seems to have support for using NamedTuples or TypedDicts, but my classes dont seem to be either,
I dont know if it is possible to get pybind11 to make them like that?

And I have also found people doing it by casting their classes as pydantic dataclasses: https://stackoverflow.com/questions/68651305/create-a-pydantic-basemodel-definition-with-external-class-or-dictionary

But that approach didn't work either for me, I get pydantic models but they seem to be empty, no variables.
So I expect that is something missing from the generated classes, or just not the way pydantic expects it to be.

Reproducible example code

No response

Start by reviewing the pybind11 documentation and the reported Pydantic integration approaches. Build a minimal reproducible example, since none is included, and determine whether bound classes can expose the structure Pydantic requires. Done should be a clear compatibility result with documented behavior or a narrowly defined implementation path.