Man pages matching name xcb_dri3_get_supported_modifiers in section 3:

xcb_dri3_get_supported_modifiers.3.en	debian 10 / libxcb-doc
xcb_dri3_get_supported_modifiers.3.en	debian 11 / libxcb-doc
xcb_dri3_get_supported_modifiers.3.en	debian 12 / libxcb-doc