R_p vs P distribution representing the planets in our Msample. Planets classified above and below the radius valley are shown in blue and green, respectively, while the red star-shaped markers are for TOI-732 b and c. The radius valley inferred via the SVM-based method is marked by the solid grey line with the shaded region highlighting the 1 σ limits of the best-fit line. The two parallel dashed grey lines are the median boundaries passing through the supporting vectors that determine the location of the solid line. Finally, the red lines represent the theoretically expected R_p,valley boundary in case of a thermally-driven mass-loss scenario (solid line as computed from Affolter et al. 2023; negative slope) and the R_p upper limit of planets borned rocky in a gas-empty disc (dashed line as computed from Lopez & Rice 2018; positive slope).