Best worflows for supporting Ultrawide in menus

Hey,

I want to support Ultrawide since apart from anyone else, I have an ultrawide monitor. Obviously, the game engine supports it fine, but when it comes to menus, some games have clear edges where an overlay or background was added and it only fits a 16:9 aspect. I wondered what the general workflow would be to support it when it comes to menu background etc. IE should I be using ultrawide textures and have them crop at standard ratios, or have a resolution detection and a multitude of background options for different monitors. I know technically how to do it, I just wondered what sort of methods are usually used for this.