I feel like I’m googling the wrong thing since I’m mostly getting start menu replacements and not a supplement. I want to click the ps button or a keyboard button and have a grid pop up over my apps that displays pinned apps/games that I can scroll through and launch with my controller or keyboard. Does something like that this exist?
Rofi is certainly a great choice, though it relies on scripts to customize it to your needs. These scripts can be anywhere from extremely basic to insanely complex but you have to create them.
Personaly I use it as: