PopOS and SteamOS have this out of the box, hit the Windows key (or whatever the genericized icon is on your keyboard) to bring it up. On SteamOS it brings up t

PopOS and SteamOS have this out of the box, hit the Windows key (or whatever the genericized icon is on your keyboard) to bring it up. On SteamOS it brings up the Start menu equivalent and on PopOS it brings up a lightweight UI like in the OP, but both are fuzzy-searching application launchers. I assume the same thing is standard on other Linux distros, those are just the ones I have on hand.