Abundance pattern observed in the host of GRB 210905A from the total absorption-line profile. The linear fit to the data (solid line) determines the total metallicity [M/H]_tot (intercept) and overall strength of depletion [Zn/Fe]_fit (slope), as labeled. See Sect. 4.4 for a full description. The right panel represents the fit obtained after correcting the relevant elements for α-element enhancement of 0.3 dex (black points and limits).