By following these steps and tips, you can effectively stream your desktop and non-Steam games using OBS, enhancing your gaming experience and flexibility.

Fire up the Steam desktop client. From the top row of the UI, head to Games > Add a non Steam game to library > Browse. Prism Launcher should be listed in your applications here.

You can even use it for non-Steam games. Conveniently, the recording only captures the relevant game window, so your desktop (and thus your well-hidden obsession with troll dolls) won't be revealed.