Those aren't really text elements, there's no specific name for them. They're just stylized graphics.
The simplest approach would be to find an included Fusion Titles that you like and use that, or a third-party title that you can add to Resolve.
If you're really ambitions, you can learn to do these yourself. It's a bit of a jump for beginners, but the new Shape tools in Fusion would be good for this.
To help make things easier, Blackmagic has created some really great training materials. I'd recommend doing the books - Beginner's Guide, Advanced Editing, Fusion.
https://www.blackmagicdesign.com/produc ... e/training