Pseudo-bolometric light curve of SN 2021adxl. The best fitting model from Eq. (2) fitting to Phase 1 photometry (spectra) is given as the solid (dashed) blue line. Included in the inset is a zoomed-in image of this phase. Both a linear decline (dashed green) and possible shock luminosity curve (solid orange) is fitted to Phase 2. The magenta line is the decay expected for radioactive nickel, fitted to Phase 2, as discussed in Sect. 4.