I'm not sure if this is a bug or intended but when you create the first netherite ingot, you get all of the craftable tabs for the netherite tools, gear and armor in the craftable menu. If you click them, you do not get any recipes nor does it reference the need for a smithing table, but they will remain as craftable even if you do not have any of the materials needed to craft the gear. It's not a gamplay issue, but it does clutter the craftable menu.