It's probably a better idea to request these kind of things on the Certbot github repository @ GitHub - certbot/certbot: Certbot is EFF's tool to obtain certs from Let's Encrypt and (optionally) auto-enable HTTPS on your server. It can also act as a client for any other CA that uses the ACME protocol., as the Certbot ACME client has been handed over from Let's Encrypt to the EFF a lot of years ago already.
Please search for an existing issue before opening a new one first.
@JamesLE Maybe About the Feature Requests category should only mention the LE CA? The post from 2015 still mentions the "the Let’s Encrypt client" from when Certbot was still called letsencrypt I guess.