Unreal 5.3 Static Mesh has lighting issues ONLY on mobile

Hello, I’ve recently taken on a project where I have 3d scanned a carpet and attempted to create
an AR app that would allow you to view the model.

The model came up fine, and when viewed as a Static Mesh it does not show any problem at all:

Likewise when I use the mesh as an asset in PC based project:

However, if I try and use the AR framework and spawn the Mesh in any way shape or form this happens:

This only seems to happen when I run the actual App on my phone, not in any preview or simulation on my PC.
I’ve tried increasing the lightmap resolution to 256 and above to no avail.
I fear it may be related to the Mesh, it’s a bit messy, can somebody help?