Hey! I saw you’ve created this post earlier and had no answers, so after a quick search, I found this post that is related and checked in the Text Widget that you can actually apply material in the text:
Just make sure you set the Material Domain as User Interface.
After I made it myself, I saw some limitations when you turn to User Interface: actually you can’t apply emissive color directly to this material, you have to find a way to do that inside the Material Editor (if possible).
At least, that’s the first step to reach your goal. Hope you can find out how to do the glowing text. As my knowledge in the Material Editor is limited, this is the farthest I can help you. I’d say you can try reaching the guys from the post above, maybe they can tell you some tricks…