This is simple UMG Widget that can edit Scalability Settings. Appearance same as editor's UI. You can easily adjust the quality. Parameters have been taken from Scalability Reference and BaseScalaiblity.ini.
Additional function
Quality: Add [Auto]
Resolution Scale: Add percentage display *1
Auto saving of parameters(It will work only after packaging) *2
Add Global Illumination and Reflections settings.(2022.6.3)