Unable to add icons to external links

[hexWars]

📋 Explain your issue

Unfortunately, following the tutorial at https://docs.astro.build/en/recipes/external-links/, icons for external links are not displaying as expected. After reviewing #2970, I still don't understand where the issue lies. Does Astro automatically detect external links, and it seems like the rehype in Astro 4 has been upgraded; is the tutorial outdated?

Astro                    v4.4.0
Node                     v18.18.0
System                   Linux (x64)
Package Manager          npm
Output                   static
Adapter                  none
Integrations             @astrojs/react
                         @astrojs/tailwind

The format I use for external links is []()

[hexWars]

Oh, I think I know the reason now. It seems to conflict with tailwindcss/typography. I will close this issue.

[hexWars]

Perhaps you can include a hint in the document?