Bulk density of known sub-Saturns plotted against their radius (on the left), with TOI-6651b being the third-highest density among them (after Kepler-111c, Dalba et al. 2024, and Kepler-413b, Kostov et al. 2014). Mass of the sub-Saturns as a function of their host star metallicity (on the right), showing a positive correlation between them. The color of individual points is according to the equilibrium temperature of the planet. The position of TOI-6651b in both plots is shown as a pink edge-colored star.