Sodium is thinked for modern version of Minecraft, also jellysquid doesn't develop for forge because the core members of forge treated her badly. See the faq

No. This won't happen

Maintaining a mod for multiple loaders, while maintaining high standards, and not having a lot of time is very difficult. Please read the FAQ for more information on the why.

Pre-1.15 engine is so widely different that you basically would need a rewrite from scratch of this mod, which means it's not worth it.