Strength of the 9.7 μm silicate feature versus the bolometric luminosity, Eddington ratio, gas column density, and galaxy inclination. Yellow circles are the five QSOFEED QSO2s studied in Ramos Almeida et al. (2025) and purple squares the six GATOS Seyfert 2 galaxies from García-Bernete et al. (2024a). The horizontal dashed line in all panels indicates the separation between silicate features in absorption (negative values) and in emission (positive values).