Add files in a vault on Ios

I’m an absolute beginner. I can’t add files on the vault with Ios. When I unlock the vault, there isn’t any icon (like +) to add files.
Thank you for your attention.

Hi. Unlocked vaults are integrated in your files app. After you have unlocked a vault, just open your files app and there you’ll see your vault. If you don’t see your unlocked vaults in files app, check if cryptomator is enables as location in files app.
See here: Working with Vaults — Cryptomator 1.6.0 documentation