  Nonreciprocal superconducting devices have attracted growing interest in
recent years as they potentially enable directional charge transport for
applications in superconducting quantum circuits. Specifically, the
superconducting diode effect has been explored in two-terminal devices that
exhibit superconducting transport in one current direction while showing
dissipative transport in the opposite direction. Here, we exploit
multi-terminal Josephson junctions (MTJJs) to engineer magnetic-field-free
nonreciprocity in multi-port networks. We show that when treated as a two-port
electrical network, a three-terminal Josephson junction (JJ) with an asymmetric
graphene region exhibits reconfigurable two-port nonreciprocity. We observe
nonreciprocal (reciprocal) transport between superconducting terminals with
broken (preserved) spatial mirror symmetry. We explain our observations by
considering a circuit-network of JJs with different critical currents.
