Completeness map of TOI-5789, showing the sensitivity of the HARPS-N and HIRES radial-velocity measurements to the presence of planets as a function of their mass and orbital separation, through experiments of injection and recovery of Doppler signals. The detectability inside the cell is indicated by its color, according to the colorbar on the right-hand side of the figure. The four red circles indicate the detected planets TOI-5789 b, c, d, and e, while the green shade represents the optimistic habitable zone.