FineWoven was a rare misstep for Apple. It was a brand name for what Apple generously described as a ‘premium’ material used to replace leather on phone cases and other accessories.
Apple has stopped using it for phone cases. If you want an Apple branded case for a new iPhone 16, you’ll have to make do with one made of silicone or plastic.
The FineWoven MagSafe Wallet lives on for now, but, presumably. once stocks are sold, any replacement will use a different material. And Apple continues to sell Watch straps...