Cross-correlation detection of Fe from the HARPS transits, but now using a blind data-driven PCA-based detrending algorithm instead. The white dashed lines denote the expected K_p and v_sys (K_p=200.7 km s⁻¹ and v_sys=−24.45 km s⁻¹; Prinoth et al. 2022; Anderson et al. 2018) of WASP-189b assuming a uniform and static atmosphere. The white blob near the expected location shows the observed signal of WASP-189b. Differently from Figure 6, 7, 8, and, H.1, G.1, this map has been generated from transmission spectra non-shifted by the systemic velocity. The uniformness of the CCF map between 0 and 50 km s⁻¹ at low K_p values is a result of the Rossiter-McLaughlin mask excluding values overlapping with the Doppler shadow in radial velocity space. The data product that produced this CCF map is the input for the atmospheric retrieval analysis (Section 5.3).