A Playnite theme that mimics the Switch's interface. It's a fullscreen theme.
Below are my recommended settings. While there's a lot of settings that are up to your choice, if you want your client to look like in the screenshots, you're gonna have to use Game Logos.
To change the controller displayed at theb bottom left, or the user image on the top left, head to SwitchNite's install folder (by default C:\Users\{username}\AppData\Roaming\Playnite\Themes\Fullscreen\SwitchNite_somenumbers and follow the instructions in the .png file.