Please run sudo apt update before trying to install a new package

Did sudo apt update -y
first before anything it calls for paths at kali.org, which do not exist. I personally went to kalli.org with my browser and got 404s for those paths, so I know that they do not exist. Posted about this problem, and was told again to run sudo apt update -y. Thinking "ok coo,, maybe they created those paths and put the venv files there?"

ran apt update -y as directed, results: missing public keys and other errors as shown:
sudo apt update -y
[sudo] password for kali:
Get:1 http://repo.mysql.com/apt/debian buster InRelease [22.1 kB]
Get:2 http://kali.download/kali kali-rolling InRelease [41.5 kB]
Err:1 http://repo.mysql.com/apt/debian buster InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B7B3B788A8D3785C
Err:2 http://kali.download/kali kali-rolling InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY ED65462EC8D5E4C5
Fetched 63.6 kB in 2s (41.9 kB/s)
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
29 packages can be upgraded. Run 'apt list --upgradable' to see them.
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://repo.mysql.com/apt/debian buster InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B7B3B788A8D3785C
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://kali.download/kali kali-rolling InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY ED65462EC8D5E4C5

W: Failed to fetch http://http.kali.org/kali/dists/kali-rolling/InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY ED65462EC8D5E4C5
W: Failed to fetch http://repo.mysql.com/apt/debian/dists/buster/InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B7B3B788A8D3785C
W: Some index files failed to download. They have been ignored, or old ones used instead.

Tried sudo apt-get install python3-venv again, same paths do not exist errors 4x.

Can you -
1: Create the paths that are requested by the command?
2: Put the venv files there?
3: Make the public keys available?

Kali key: https://www.kali.org/blog/new-kali-archive-signing-key/

MySQL key: Unrelated to Kali, consult MySQL support

W: Some index files failed to download. They have been ignored, or old ones used instead.

As long as you don't update your Kali key, APT uses old index files, which refer to files that don't exist anymore in the package repositories. The problem will go away after you update the Kali GPG key (see link above from @kali-bugreport) and run apt update successfully.

Closing as this is not a bug anyway