Forge 1.20.1 to NeoForge 1.21.1 Port - Custom Locked Recipes do not work with NeoForge

I wanted to compile my currently Forge 1.20.1 mod using the 1.21.1 NeoForge compiler. The problem is i have many locked recipes because my mod is a create addon and therefore i need recipes using the create processes. After exporting my mod for distribution in NeoForge i get a jar in which the recipes are present where they should be, but in game they neither work nor show up in JEI. Also i cant open the recipes in MCreator to edit the locked code, when i click on them nothing happens. When i change the compiler back to Forge 1.20.1 the recipes work as intended again. What causes this and how can it be fixed?