Full-line equivalent width measurements derived from CRIRES⁺ data and the four synthetic models presented in this study. A constant offset was added to the model curves to align them with the mean of the observed CRIRES+ values, which are interpreted as the stellar baseline. For comparison, we also include JWST/NIRISS data from Fournier-Tondreau et al. (2024); the flux values were digitized and converted to equivalent width assuming a Gaussian instrumental profile with spectral resolution R ≈ 700. The estimated uncertainty in the JWST-derived EW values is ~15.5 mÅ, but error bars are omitted here for clarity. The bottom panel shows a zoom-in of the region around the transit for better visibility, highlighting the details of the absorption features during ingress and egress, indicated by vertical dotted lines