Brep reader

this means that It will be integrated in the future?

As everything in ParaView and open source in general, it requires contribution of either time or money, see this: How are features and bug fixes incorporated into ParaView?

FYI, the package of f3d in the apt seems to be outdated, f3d --version gives 1.2.1

This is probably because you are using an old version of Ubuntu and also this is the responsability of debian packagers, not F3D developers.

You can always try the binary release of F3D though: Installation | F3D