Game Camera wider than my screen resolution; Widgets don't fit the whole Camera Space

Hey everyone! I’ve got a peculiar situation, where all my widgets, which have been made with a 16:9 screen resolution in mind, don’t cover the entire camera space. Essentially, when I add the pause menu widget to my screen when I pause the game, it doesn’t cover the entirety of the screen, and you can still see what the in-game camera is seeing around some of the edges.
I’ve attached a screenshot of the ScaleBox component I’m using in my widgets, so you can see what properties I’m using across the board. Do let me know if you guys know how I can make my widgets fit the whole screen, thanks!