The Crafttweaker 1.16 sieve doc says you can remove recipes.
Trying to follow that in 1.18.2 (and latest mod version) with:
recipetype:exnihilosequentia:sieve.removeRecipe(item:minecraft:diamond);
fails with ex_nihilo_recipes.zs:16:0: ex_nihilo_recipes.zs:16:0: No such member: removeRecipe.
Plz fix

You're trying something from 1.16 in 1.18. The versions are not compatible.

Well is there a way to remove sieve recipes in 1.18 with crafttweaker?

https://docs.blamejared.com/1.18/en/vanilla/how_to/crafting_table#removing-a-recipe