Both of these mods add their own version of polished amethyst, and since they're made either by manually sandpapering vanilla amethyst shards or by deployer, there's no way to select which one. This results in only being able to craft the Create: Utilities version, which prevents players from crafting core Northstar components.
I uploaded this datapack to your Discord already, but it removes the recipe for crafting the Utilities version of polished amethyst, and replaces the recipes for the items that used it with identical recipes that use the Northstar version instead, that way everything from both mods are craftable.
utilitiesnorthstarcompat.zip