If you need to hide the dumb notch, I’d take my nice wallpaper, scale it down to the exact resolution, and just add a black bar as high as the menu bar is. This can be a bit ugly when the wallpaper appears without the menu bar, but it’s a fine solution nonetheless. (I had to do this in Big Sur, since the OS thought my wallpaper works best with a black text on the menu bar, which wasn’t actually too readable.)