It wasn't until I built my game did I realise that the AO script I had been using actually didn't work well with my unlit textures and was blown out and blurry in the test build. Unfortunately, this meant I had to remove the script in my final build as I didn't have time to find another AO solution. It's a shame this happened as you can't see any of the detail I had worked hard to show through my 3D assets.

This is what the game would've looked like (This is how the AO script appeared in editor):