If you didn't read the patch notes for creative, they added the premium crafting parts to creative, meaning they can all return to BR at any time.
Look at this shit:
- We’ve added the following resources from Save the World for use in games:
- Fibrous Herbs, Flower Petals, Rough Ore, Planks, Rough Mineral Powder, Simple Mineral Powder, Fine-Grain Mineral Powder, Char-Black Mineral Powder, Oxidized Mineral Powder, Quartz Crystal, Stringy Twine, Simple Twine, Study Twine, Peaky Twine, Carved Twine, Blast Powder, Rusty Mechanical Part, Simple Mechanical Part, Study Mechanical Part, Sleek Mechanical Part, Efficient Mechanical Part, Rotating Gizmo, Copper Ore, Silver Ore, Malachite Ore, Obsidian Ore, Brightcore Ore, Shadowshard Crystal, Sunbeam Crystal.
- These can all be found in the Consumables tab.
Source: https://www.reddit.com/r/FORTnITE/comments/nv5oz2/epic_really_cares_about_their_premium_experience/