Two- and one-dimensional marginalised posterior PDFs of interior parameters for TOI-402.01 (upper panel) and TOI-402.02 (lower panel): thickness of atmosphere (d_env), water mass (m_water∕M_p), size of rocky interior (r_core+mantle), core size (r_core), and mantle composition (Fe/Si_mantle and Mg/Si_mantle). The prior PDFs are shown in dashed (except for d_env for which no explicit prior is defined), while the posterior PDFs is shown in solid lines. Earth-like interior values are shown in red for reference.