Here is the observed and projected light curve of comet Tsuchinshan–ATLAS from the excellent website http://astro.vanbuitenen.nl/comet/2023A3 by @giddgvb

Apparent magnitude 6.5 and below are visible to the unaided eye, under good visibility conditions (lower magnitude means brighter). Objects about 3 magnitudes fainter can be seen with binoculars.

Current brightness is around 3. Peak brightness at mag 2.5 is expected around Oct 10. Forward scattering by the Sun may cause mag -2.5 level brightness.
4/n