Man pages matching name xcb_render_free_glyph_set in section 3:

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