Radial profiles of gas metallicity from 0.5R_500, c up to 10R_500, c. Grey lines represent single objects, while the coloured ones are the mean values computed in mass bins. The dashed green line and its related shadow region show the median and the 16th and 84th percentiles of the gas metallicity distribution over 2R_500, c (). The black dots are the observed estimates of gas metallicity from Ghizzardi et al. (2021).