Detection limits at S/N = 8 for H₂O, CO, and the full model for our ERIS/SPIFFIER observations of the AF Lep system. The detection limits were calculated for the full 178 min total integration time, which required just over 4 h of telescope time, and did not use ADI as it was not yet available at the time of our observations. The contrast and angular separations of the other directly imaged exoplanets indicated in this figure are taken from the following studies: β Pic c from Nowak et al. (2020), β Pic b from Bonnefoy et al. (2011), HR 8799 e from Marois et al. (2010), AF Lep b from De Rosa et al. (2023), and 51 Eri b from Samland et al. (2017).