1. Add your recipe serializer id to lockable_recipe_types.json
2. RecipeSynchronization.synchronizeRecipeSerializer(RecipeSerializer)
3. Client-only: RecipeUnlockDisplayRegistry.register(RecipeSerializer, Function<RecipeHolder<T>, RecipeUnlockDisplay>)
4. In the code that does recipe stuff, check PlayerResearchTracker.canCraftRecipe(Identifier)

Good luck!

TODO an actual tutorial