Bolometric correction for J0921+0007 (pink error bars) compared to predictions from Duras et al. (2020) for the full AGN population (solid blue line) and Lusso et al. (2012) for type 1 AGN (solid brown line). The dispersions are quoted at the 68% level (blue shaded area and brown shaded area). The strong X-ray emission of J0921+0007 with respect to its disc emission causes it to deviate at the > 1σ level from the typical AGN K_bol − L_bol. The green error bars show the bolometric correction for the second eFEDS high-z quasar (Wolf et al. 2021). We note that the bolometric correction of Lusso et al. (2012) is only valid up to log L_bol = 13; the extrapolation (light-shaded area) is shown for visualisation purposes only.