DH Server getting 10fps after Client-only was getting 120fps

I'm running a 1.20.1 server. First run was my client only. I ran around for several minutes rendering and generating LODs for chunks all around my world. FPS was stable at roughly 100fps-120fps. Had a friend join and everything worked fine. FPS was doing great at 100+fps for him.

I installed DH on the server so that everyone could share LODs and get real-time updates and as soon as I am loading in my FPS is a solid 10fps, and he is getting around 20fps-30fps (probably only because he is running at a lower resolution is my guess.).

Mod List:
  • Distant Horizons
  • Concurrent Chunk Management
  • Faster Random
  • FerriteCore
  • Indium
  • Iris
  • Lithium
  • Memory Leak Fix
  • Mod Menu
  • ModernFix
  • Noisium
  • Sodium
  • Starlight
(Screenshot attached with F3 menu shown.)

I'm just wondering how to fix the sudden frame drop. Am I missing something? Should we just run client-only? I don't know what to do. All help is appreciated.

~ Alph
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