You can make your own content without the logo and without getting approval, if you want to use any of their trademarks in your materials (the Unreal logo, the made with Unreal stuff, etc.) then you have to get it approved.
You can make your own content without the logo and without getting approval, if you want to use any of their trademarks in your materials (the Unreal logo, the made with Unreal stuff, etc.) then you have to get it approved.