In macOS, you can go to System Preferences → Keyboard → Text and configure text replacements. This allows users to set shortcuts for often typed characters or phrases. For example, I often use the 
emoji on pages that are experiments. In most apps, I can type //exp and macOS will replace that with the emoji. In Figma it does not, so I have to open the emoji palette, track down the one I want, and insert it from there.
Figma should support this default OS behavior.
It’s a small thing, but it is a timesaver.