Here is a link to the AAVSO chart. For those who haven’t used them before you can adjust the size and orientation by clicking plot other chart, and access the magnitudes of the labelled comparison stars by clicking photometry table for this chart.
https://app.aavso.org/vsp/chart/?star=SN%202023ixf&fov=60&maglimit=14.5&resolution=150&north=up&east=left
Andy
British Astronomical Association
Supporting amateur astronomers since 1890