My apologies.
The discovery of this SN was on 11th November 2021.
from
https://www.physics.purdue.edu/brightsupernovae/
"image 2021aefx (= DLT21ae) (= MASTER OT J041953.41-545653.3) (= Gaia21fml), TNS discovered 2021/11/11.521 by DLT40
Found in NGC 1566 at R.A. = 04h19m53s.402, Decl. = -54°56'53".08
Located 61".2 west and 36".5 south of the center of NGC 1566 (Stan Howerton image)
Mag 13.0:12/26 (12.0:12/2), Type Ia (z=0.005) (References: AstroNote 2021-290, ATEL 15077, Gaia observations)
2021aefx images sub-page"