  Two far-forward experimental systems are currently taking data during Run 3
at the Large Hadron Collider (LHC): FASER + FASER$\nu$ and SND@LHC. They are
sensitive to some classes of beyond-the-Standard Model (BSM) particles, muons
and neutrinos produced in the ATLAS interaction point (IP) and propagating for
several hundred meters along the tangent to the accelerator beamline, up to the
caverns where they are respectively located, in opposite directions with
respect to the IP. Proposals are being prepared to extend these experiments to
bigger ones during the HL-LHC phase. Building a Forward Physics Facility (FPF)
capable of hosting a number of far-forward experiments characterized by
different detection techniques, kinematical acceptance and purpose, is a
possibility also under discussion. In this contribution I discuss some of the
BSM and SM signals and backgrounds at the FPF, mainly focusing on QCD-related
aspects.
