Any particular reason why you started a new post for this?
Because my (working) sources.list looks exactly as the documentation that I both linked and quoted.
┌──(kali㉿kali)-[~]
└─$ cat /etc/apt/sources.list
# See https://www.kali.org/docs/general-use/kali-linux-sources-list-repositories/
deb http://http.kali.org/kali kali-rolling main contrib non-free non-free-firmware
# Additional line for source packages
# deb-src http://http.kali.org/kali kali-rolling main contrib non-free non-free-firmware