I played a game of Void block a while ago, and upon coming back I have an issue where I do not have any recipes for using void flux to speed up making many things by 50%. I do not have any of the recipes in the factoriopedia either so its not that I haven't researched them either. Was this taken out or is there another issue? I tried taking out all of the mods besides the 3 space age ones and Voidblock/Voidcraft but still having the same issue.

Nevermind, as I got to the tech tree they do just not appear in the factoriopedia. They are in the game as normal. My appologies!

The recipes weren't removed. They're supposed to be automatically unlocked when you research the appropriate corresponding recipe. Some other mod may have interfered with this happening, but that doesn't explain why you're still having issues even with other mods removed. Try typing /vc_fix_recipes in the console, which should hopefully unlock whatever recipes you've researched.

EDIT: Ok! I'm glad things are working for you.

Would you mind explaining why you chose to set hidden_in_factoriopedia for those recipes. It was very confusing initially how the tech for voidflux claimed it would enable more efficient recipes, but then seeing no indication that such recipes existed.

Mostly just to avoid having too many redundant recipes. Whether the recipes are hidden could be a setting, though.