This Unreal Engine 5.6 video is about showing how to use a Rich TextBlock with Colors, then adding Typewriter logic, and finally, making the Typewriter logic work with Rich TextBlock Style Tags.
We start by setting The (Empty) Map and using the Level’s BeginPlay to add the HUD Widget Blueprint to the viewport, and then in that HUD Widget Blueprint, we add a Border with Rich TextBlock child. Next, we add the required Rich Edit Style Data Table, to make the Text readable. We follow that up with adding a row for Green Text and showing how to edit the text to include Style Tags, and then move on to showing the text over time, with the typewriter effect. Next, we add the Green Style Tag back in and explain why it doesn’t work, and then go through the steps to parse out the Style Tags and add them back appropriately. We also show how to skip through the text as it is being displayed, for less patient gamers like myself.
https://dev.epicgames.com/community/learning/tutorials/eZK3/unreal-engine-rich-text-block-and-the-typewriter-effect