From left to right: Optical spectroscopic evolution of SN 2024bch at t≥ +42 days (Panel 1; along with the identification of the most prominent spectral features), evolution of the Hα profile (panel 2), Hβ (panel 3), and NaIDPanel 4 features in the velocity plane at the same epochs. Yellow lines correspond to the rest-frame wavelengths, while blue lines mark the evolution of the P Cygni absorption minima. Phases refer to the estimated explosion epoch.