Setting Unicode icon as Text Object's value and display the icon in the editor

I read through another topic that says unicodes are not supported in c# but whatever...

https://answers.unity.com/questions/170109/is-there-any-way-to-display-unicode-characters.html

So I am looking at the scene and the inspector for an asset i purchased (OSK https://assetstore.unity.com/packages/tools/integration/osk-on-screen-keyboard-77689)

There are several demo scenes where unicode images are shown even when the play mode has not been enabled. What is so confusing is that the actual text input is blank but it still shows the gear icon...

I even added another text input and just copied the values of the first and again it shows the gear but there is nothing in the input...

I can change it from an icon to text but can not seem to understand where or how to set the icon

In the screenshot you can see the text input is empty but the gear icon is clearly visible...

I double checked and no scripts take any action on newly created text input.

I am so confused someone please help