As far as I can tell both SodiumOptions and SodiumExras require Reese's Sodium Options which is no longer compatible with embeddium. Since technically embeddium has RSO built in it shouldn't be a requirement anymore? I was wondering if this was intended or simply has not been patched yet. Same issue as #10 just on Neoforge.

[Render thread/FATAL] [ne.ne.fm.ModLoader/CORE]: Error during pre-loading phase: Mod sodiumoptionsapi requires reeses_sodium_options any

NeoForge : 21.1.119
embeddium : embeddium-1.0.15+mc1.21.1
SodiumOptionsAPI : sodiumoptionsapi-neoforge-1.0.10-1.21.1

You should not be using Embeddium on 1.21+ as stated in the related issue you just linked.

Alright. Well if anyone else stumbles into this post wondering the same it seems Embeddium (Rubidium) Extra saves the day.

Why use Embeddium? Compatibility. It seems to play nice with mods like More Red. Base sodium breaks the cable visuals.