Hi Connor,
Supernova are too distant for any change in their distance or location to be measured. Though monitoring the changing brightness and spectra of brighter supernova is frequently done by members of the BAA Variable Star Section.
I attach a plot from the BAA Photometry Database of SN 2026kid, photometry again by Ian Sharp.
Robin Leadbeater is an expert at obtaining spectra of supernova. This is tough for amateurs as supernova are faint and typically require large telescope to obtain usable spectra. Here are a couple of spectra from the BAA Spectroscopy Database of SN 2026kid by Robin.
https://britastro.org/specdb/data_graph.php?obs_id=20917%2C20670&multi=yes&mix_flux=no&plot=Plot+up+to+20+Spectra
Cheers,
Andy
