Unless I'm missing something, fish lube doesn't seem to be working in this little modpack. Maybe it's another mod I have interefering with it but seeing as fish lube was last updated 9 months ago I feel like it's reasonable something small might be broken. I can post my whole mod list if need be but it's a bit long and everything fish related is in this modpack, except for Eat or Die, I tried disabling Catch and Release and still couldn't find a fish lube recipe anywhere.

Just tried disabling Eat or Die as it uses fish but isn't in this modpack and still no fish lube recipe to be found.

Blue belts show as being craftable in the fish farm but there's no way to change the fish farm's recipe? I am so confused

Sorry for the late response. The fish farm only produces fish. You will need a chemical plant to process the fish into oil based products. If it's not in the chem plant recipes please let me know. Cheers!