  We show how a recently proposed solid state Majorana platform comprising a
planar Josephson junction proximitized to a 2D electron gas (2DEG) with Rashba
spin-orbit coupling and Zeeman field can be viewed as an effectively one
dimensional (1D) Kitaev chain with long-range pairing and hopping terms. We
highlight how the couplings of the 1D system may be tuned by changing
experimentally realistic parameters. We also show that the mapping is robust to
disorder by computing the Clifford pseudospectrum index in real space for the
long-range Kitaev chain across several topological phases. This mapping opens
up the possibility of using current experimental setups to explore 1D
topological superconductors with non-standard, and tunable couplings.
