Fe I detection with GIARPS during Night 2. For each instrument (top row: GIANO-B; middle row: HARPS-N), we present: the 2D CC maps in the (K_p, V_rest) plane, expressed in terms of S/N (left panels, colour scale); and the corresponding likelihood confidence interval maps (right panels). The bottom row shows the combined GIANO-B + HARPS-N confidence interval maps. Although the detection is primarily driven by HARPS-N, GIANO-B contributes by cleaning the signal and reducing spurious peaks in the likelihood maps.