Black hole mass functions at redshifts 5 and 6 for the fiducial (solid black lines), DEL (dashed black lines), ins-sn099 (solid pink lines), and del-sp099 (dashed blue lines). The thin lines represent all BHs, while thick lines show BHs with L_Bol ≥ 10⁴⁴ erg s⁻¹ and $f_{\mathrm{Edd}}^{\mathrm{eff}}>0.1$. Observational constraints from Pre-JWST come from Willott et al. (2010a) and Shankar et al. (2009), while JWST predictions are taken from Kokorev et al. (2024), and Matthee et al. (2023).