Icon CSS should load automatically

FYI I added "menu_bootstrap_icon/cdn" to my theme's libraries list and it's working, but this wasn't documented anywhere.

In reviewing the codebase I see that the library is loaded via the field formatter, but there's no logic to make it load when adding menu icons.

The issue is same to me.
I am using Bootstrap5 theme as default and admin theme but icons is not rendering for default theme.
so the CDN path is not including in Default theme source.

Created a separate issue for CDN path issue.
https://www.drupal.org/project/menu_bootstrap_icon/issues/3436461 🐛 CDN link is not reflecting in source. Active

I also came across this, the CDN library is attached at various points in settings forms and the likes, but not when a menu item is actually viewed.

I think the menu icons will show with the custom theme, it's so easy to add to the custom theme. so we don't need to use hook page alter.
I can modify the hook page but I think it loses performance.
we can add this in customTheme.info

libraries:
  - menu_bootstrap_icon/cdn

CDN option is used for theme admin like Claro. This doesn't mean cdn is also used for frontend.

Add instructions to the home page module

That will help, thank you.

If you don't want to try to handle it automatically, an addition to the README.md file would be helpful.

The issue is solved for me according comment #6

+1 for the patch.