Issues with textures and/or lighting when using AR

Not sure if this would be the right place to post about this issue but here goes nothing.
Everything seems to work somewhat fine, but the mesh just looks terrible once I open the app on the phone. Here is a video of what I’m talking about. Today I’ve already burnt myself trhough trying to get the Android compiler to work smoothly and I’m at a complete loss. Any help or advice would be greatly appreciated. Thanks!