Results for the observed sample. Top row: Kiel diagram for the observed sample stars with S/N > 10 dex and labels within training limits color-coded with [Fe/H]. (b) Same plot as (a) but for stars with S/N > 10 pix, GES-iDR6 flags and E_VRAD < 0.5 km s⁻¹. (c) Same selection as (b) but for E_VRAD ≥ 0.5 km s⁻¹. Each subplot shows a histogram of the labels on the left and top axis. Bottom row: A(Li) vs. [Fe/H] color-coded with T_eff for the same stars as the Kiel diagram on top.