How can I force 16:9 on iPhone X/XS?

Hey guys,

I am developing an AR-App that uses the “ARKit Passthrough Camera”-node and equivalent “GoogleARCore Passthrough Camera”-node for occlusion using the solution mentioned in this thread.

answers.unrealengine.com - ARKit Passthrough Camera Material Scaled Different

As using this material results in stretching on non 16:9 display formats, I would like to, as a last resort, force the old 16:9 app-format, as if iPhone X was unsupported. In that format none of the stretching happens.

How can I remove iPhone X display format support?
Nobody seems to know how to scale the Passthrough-Camera…

Thanks, really appreciate the great UE4-community!