I'm not surprised, use of NX or SolidWorks is expected for such products design.
> That's according to the internal info side the .stp files
2D drawing also produced with NX (according PDF properties)
ADDITION: Just tried to open this STEP-file with gCAD3D[0] CAD app — no luck.[1]
[0] https://gcad3d.org
[1] https://twitter.com/app4soft/status/1492437707427127298
[2] https://github.com/FreeCAD/FreeCAD
[3] https://github.com/realthunder/FreeCAD_assembly3/releases
[4] https://twitter.com/app4soft/status/1492457657277497348
That it produces decent Step files which FreeCAD can open is even better. :)