Some dir are not shipped anymore in the assimp dir of qtquick3d, while they are still present in qt3d. This appeared in qt6.4

Would you strip the version of assimp in qt3d down as it was made in qtquick3d.

Looks like the reason lies here:

https://github.com/qt/qtquick3d/commit/fe12900b0ce9360410f753540f00391db74752fe

https://github.com/qt/qtquick3d-assimp/compare/a0f31bda39ed600e0ff9382475c82d0f82584643...0ba4945f9ebc68e51f74d65018610bd9e35f8a80#diff-618cd5b83d62060ba3d027e314a21ceaf75d36067ff820db126642944145393e

Comment says:

The zip file generated by git archive is down from 32 MB to 2MB.
This may still include unnecessary files, but it is at least now closer
to how 3rd party components are handled elsewhere in Qt (i.e. stripped
down).

Maybe qt_attribution.js would need to be updated too