Mass outflow rate Ṁ_out,ion (left) and kinetic power P_k,ion (right) of the warm ionised gas phase as a function of AGN bolometric luminosity L_bol. The grey circles show ionised gas outflows at 0 < z < 3.5 by Fiore et al. (2017), the green stars show two z ∼ 6.8 QSOs from the GA-IFS GTO programme by Marshall et al. (2023), and the blue stars show the range of bolometric luminosities inferred for GS_3073, as discussed in Sect. 4.1. We have scaled the measurements by Fiore et al. (2017) and Marshall et al. (2023) to correspond to an electron density in the outflow of n_e = 1000 cm⁻³, as assumed in this work. For L_bol, we indicate a representative error bar of 0.5 dex, and for Ṁ_out,ion and P_k,ion, we indicate how much they would change if n_e, R_out, or v_out were different by factors 1/5, 5, and 2/3, respectively (see main text for details). The dashed line in the left panel is a linear fit in logarithmic scales to the data by Fiore et al. (2017). The dashed lines in the right panel show constant ratios of P_k and L_bol. The outflow energetics of GS_3073 in relation to the bolometric AGN luminosity are consistent with lower−z scaling relations, suggesting that the driving mechanisms in z > 5 AGN do not differ from their lower−z counterparts.