This is using JustEnoughCalculation-1.12.2-3.2.3

while it's not ideal, you could do this by breaking the recipe up into multiple smaller recipes using labels and then have the final item made of all the label groups

Is there a way to do this through the JEI integration, or would I have to write down all the items and split them up?

@aaronhowser1 You can have as many ingredients in 1.14+, I guess. But in earlier versions, which are not in development, I'm sorry you can only achieve it manually. It truely bothered me sometimes, but I have no time for it.

It's totally fine, placeholders work instead

@aaronhowser1 Nice! You got the point!