Distributions of the SDSS analogues and our JWST faint AGNs sample in the log([O III]/H[[INLINE259]]])-log(R_Fe) plane with the O32 ratio colour-coded (except for the faint AGNs where the [O II] was not measured). White contours show the distribution of SDSS AGNs. The diamond with thicker black edges represents the value derived from the low-luminosity composite spectrum. Alongside the main anti-correlation, a secondary branch of SDSS objects detaches (the dashed lines guide the eye along the two branches), which still shares O32 values similar to those of the main trend. Notably, the JWST low-luminosity sources follow this steeper anti-correlation trail, likely driven by low metallicity as explained in the text.