If you scan the Urbosa Amiibo but don't get the Vah Naboris Divine Helm, you'll have three options:
After scanning the Urbosa Amiibo, you'll receive Assorted Meat, a Gerudo Scimitar, and you'll have a chance to unlock the Vah Naboris Divine Helm.
Similar to its predecessor, Tears of the Kingdom allows you to unlock the Vah Naboris Divine Helm by scanning the Urbosa Breath of the Wild Amiibo, but you'll need a bit of luck. Scan the Urbosa Breath of the Wild Amiibo
How to Unlock the Vah Naboris Divine Helm