Posterior distributions and derived masses of the six retrieval cases described in section F. The retrievals were performed with fixed chemical abundances, temperatures and mean molecular weights as reported in Benneke et al. (2024) and Holmberg & Madhusudhan (2024). We can enforce a planet mass consistent with Van Eylen et al. (2021) for either atmospheric composition through the use of a delta-prior, but this also forces a change in the radii of both the planet and the star. All retrievals favor a planet mass on the larger end of the RV-measurement predictions.