Flash-ionisation features in SN 2022lxg. Left: Keck+LRIS spectrum, +2.20 d after the explosion. We see flash-ionisation lines of Hα, Hβ, Hγ, and He IIλ4686, on top of a blue continuum. The red spectrum below is a model from Dessart & Jacobson-Galán (2023) (‘mdot1em3early_nb5’) with a steady pre-explosion wind of 1 × 10⁻³ M_⊙ yr⁻¹ that successfully reproduces the early continuum shape and the flash-ionisation lines. The insets focus on the flash-ionisation lines of Hβ and He II (left inset) and of Hα (right inset), with the dashed vertical lines denoting the rest wavelengths of those lines. Right: Early, continuum-subtracted spectra of SN 2022lxg. Flash-ionisation lines are marked with dashed vertical lines. From left to right, we detect Hγ, He II, Hβ, and Hα. The spectra (apart from the LRIS one) are binned to 12 Å for visual purposes. The horizontal dashed lines denote the zero flux level of each spectrum after the approximate continuum removal. The telluric features are marked with shaded, vertical grey lines.