AppSheet uses icons from Font Awesome for format rules, actions, views, etc.
But these images aren’t available to choose from when an image column is added to a table. Users can upload new images, but they can’t select from this set of icons- unless they had downloaded them ahead of time.
Then, I built a sample app using only the text-name, and a virtual column to retrieve the image:
To add these icons to your app, you can either copy the sample app and build on top of it, or add the public sheet to your app and add a new virtual column: