You can create overlays, backgrounds, logos, and any other types of graphics in programs like Canva, Photoshop, and Figma.
We have an easy-to-follow tutorial on using Figma available below:
Please click here to access the template that is used in the demo above. Additionally, you can find information on the required file size and dimensions here.
If you would rather have someone else do this for you, consider looking at StreamerTemplates. StreamerTemplates offers a large selection of both free and paid templates.