Unmatched Graphics and Poor Performance in Oculus Quest 2 VR Application Built with Unreal Engine

I developed a virtual reality application using Unreal Engine for the Oculus Quest 2 headset, but the graphics in the packaged app don’t match what I see in the Unreal Editor. I’m also having performance issues like slow navigation and delayed graphics. Can someone help me understand why this is happening and offer a fix?

thanks