Spectral sequence of SN 2022xxf during the first LC hump. Spectra are normalized by their average values and not corrected for reddening. Phases are in the observer frame, relative to the first LC maximum. Prominent spectral lines are indicated by vertical lines corresponding to the rest wavelengths. Vertical gray shades indicate spectral regions affected by telluric absorption. All spectroscopic data, including those presented in the subsequent figures, are available in electronic form at the CDS.