Well, it could've been ideal if not... you probably know that one.

Embeddium 0.3.19

After some digging, I've found the issue. FREX is fabric only, so there's no way of doing it on forge. Lazurite could work, however it is designed to load the mod as a fabric mod and then run it on forge. Not sure how to continue, might poke Su5ed and/or embeddedt about it

I'll have a look later

might be related to Sinytra/Connector#932 (comment)?

Ok, issue has been found, and I'll look into a propper fix. If nothing happens soon-ish (when I'm back at my pc), I'll simply remove the message and let it be rendered.

I've spoke with Su5ed, and a solution is being made. I'll push a temp solution (which uses vanilla even when sodium is present), but it should at least work. Hope a proper fix comes soon.

could this solve the issue?
FiniteReality/embeddium@afe39fe

Yep asked embeddedt if he could provide something like that. I'll have a look at actually using it now.