I use a square monitor and I want my packaged game to run in a way that it does not stretch to fit my monitor and instead Stay the same shape it was in the editor and just add black lines to the top and bottom like how the other games do it to keep the 1280x720 shape
Hello! Check two panels - Size Box (Size Box | Unreal Engine Documentation) and Scale Box (UMG Scalebox... - Blueprint Visual Scripting - Unreal Engine Forums).