Ternary diagram with the 1σ confidence region of TOI-969b in scenario 1 (black), where only the mass and the radius are considered as input data, and in scenario 2 (red), where the stellar abundances are also included as input data in the MCMC interior structure analysis. The mantle mass fraction (MMF) is defined as MMF = 1 - CMF - WMF. The green dot and red square indicate the position of Earth and Mercury in the ternary diagram, respectively.