Hey there^^
As mentioned in discord, removing / overwriting stuff isn't possible right now with datapacks.

I can add new recipes with datapacks or similar api's like KubeJS, but can't remove any of the existing ones.

Tested with combiner.

Forge: 35.1.13
Alchemistry: 1.16.3-2
Chemlip: 1.16.3-1

Cheers 🍺

Looks like some newer forge and kubejs versions including your own update fixed this :)

Cheers