Thanks for sharing! We are always looking for ways to improve our product, and your idea could certainly become a great addition to our product! In order to make sure your ideas reach our product team, would you please so kind and submit your idea to our Wish List?

Here is a handy guide to get you started on how to navigate the Wish List: Wish List: Everything You Need to Know.

Thank you for making Miro better!

@Simon Thompson - While you wait for an official app, if you (or anyone you know that uses Miro) has a development background, it wouldn't take much time to create your own custom web-plugin to add a button that would let you quickly add these icons to your boards. Here's an example from Miro's developer platform documentation:

https://developers.miro.com/docs/web-plugin-examples#custom-icon-set-with-drag-and-drop