LOD generation not occurring on Pre-generated world

Hello, I am attempting to pregenerate LODs for a large server map in a 1.21.4 single player world, when I encountered an issue where LODs were not generating. I have been in this area for a significant amount of time and not a single chunk outside of vanilla rendering distance has generated.

Attached is the mod list I am using and a picture of the world.

Thank you so much for your help.