There's currently no way to add body and footer. Because there's no standard as of how to parse or what to parse. If you use Conventional Commits, only the BREAKING CHANGE: content in the body will be parsed.

In order to parse more information from the body/footer, you could implement a custom commitizen, see: https://commitizen-tools.github.io/commitizen/customization/#custom-changelog-generator

For example, this cz rule will include the commit body:

from commitizen.cz.base import BaseCommitizen
from commitizen import git
class NewCommitizen(BaseCommitizen):
 def changelog_message_builder_hook(self, parsed_message: dict, commit: git.GitCommit) -> dict:
 m = parsed_message["message"]
 body = commit.body
 parsed_message["message"] = f"{m}\n{body}"
 return parsed_message

You can easily bootstrap a new commitizen rile by using the template:
https://github.com/commitizen-tools/commitizen_cz_template

Regards