GFM includes 5 "alert" block types. I'd propose adding official support for these in Org:
#+begin_note Useful information that readers should know, even when skimming content. #+end_note #+begin_tip Helpful advice for doing things better or more easily. #+end_tip #+begin_important Key information needed to achieve goals. #+end_important #+begin_warning Urgent info that needs immediate attention to avoid problems. #+end_warning #+begin_caution Advises about risks or negative outcomes of certain actions. #+end_caution See https://iamroq.dev/posts/gfm-alert-blocks-styled-callouts-in-your-markdown/. Pandoc already exports these block types from Org: https://github.com/jgm/pandoc/issues/9475 They could be styled like `quote', but with similar coloring as in the above link.
