Is there a way to remove recipes for Tech Reborn using LibCD or datapacks, as I specifically need to remove the enchanted golden apple recipe from the Chemical Reactor, as that item has special uses in our server.

Yes for both

How may I go about doing that? What is the code required to remove it in a datapack, or in LibCD as I can remove all vanilla recipes using RecipeTweaker.removeRecipesFor(), but it doesn't remove Tech Reborn recipes.

The way I did it was by overwriting the original recipe (ie. exact same namespace/path) with a json containing an empty object {}. Don't know if that's the intended way but it hasn't broken anything yet.

https://wiki.techreborn.ovh/doku.php?id=development:libcd

this wiki page should help