Relation between gas concentration, defined as the ratio of hot gas mass within 0.1 R₂₀₀ to that within R₂₀₀, versus halo mass. The blue points represent results derived from the stacked data. The big purple point shows the result based on the electron density profile of the CHEX-MATE clusters stacked in eROSITA (Lyskova et al. 2023). The solid black line represents the best-fit relation based on the combined stacks of eFEDS and CHEX-MATE data. The small purple points indicate the mean relation predicted by the Magneticum simulation, with the shaded region illustrating the dispersion around this relation. The pink squares display the results obtained using the same stacking technique applied in this study to the X-ray surface brightness profiles derived from mock galaxy groups selected using the Robotham et al. (2011) algorithm on the mock eROSITA data from the L30 lightcone of Magneticum.