How can I fix flickering in a distant terrain object with a VR flight sim for the Oculus Quest?

Hello. I'm working on a flight simulator for the Oculus Quest, and need to be able to render my simple terrain a significant distance from the OVR camera. In the editor there is no flickering in the distance, but in the Quest it is significant. I've converted my mesh to a simple .obj but the issue still occurs (have increased anti-aliasing as well with no improvement). Anyone have a solution to this issue?