Something I've started doing for my command-line tools is including a page in their online documentation that shows the --help output for all of their sub-commands
I mainly do this because having the help output displayed online somewhere makes it much easier to casually review for opportunities to improve it!
For sqlite-utils for example I realized that having example usage for each command is a really big usability improvement.
Here's that page: https://sqlite-utils.datasette.io/en/latest/cli-reference.html