I'm also getting the same error as to op:
Seems like FreeCAD is still in working order:
www.freshports.org
I also did:
and also:
Still same issue and doesn't find anything:
Thanks.
pkg install FreeCAD
Code:
pkg: No packages available to install matching 'FreeCAD' have been found in the repositories
Seems like FreeCAD is still in working order:
FreshPorts -- cad/freecad: General purpose 3D CAD modeller
FreeCAD is a general purpose parametric 3D modeler. FreeCAD is aimed directly at mechanical engineering and product design but also fits in a wider range of uses around engineering, such as architecture or other engineering specialties. FreeCAD features tools similar to Catia, SolidWorks or...

I also did:
portsnap fetch
portsnap update
and also:
pkg update -f
Still same issue and doesn't find anything:
pkg search freecad
Thanks.