Top: Spectral region surrounding the potential Na I D lines (red, vertical lines) in the spectra of SNe 2020able (left), 20191sm (middle), and 2021wvg (right). Transparent, lime regions correspond to the background to estimate the local, linear continuum (lime, solid line). The location of the He I λ5876 Å is also shown in the panels. Bottom: Zoom-in on the normalized-by-continuum spectral regions presented in at the top.