No, this is about transferring the ownership of an ecash token.

The token can just be a random nonce, then anyone who knows that nonce can spend the token.

The token can also be a public key, then only he who knows the private key can spend the token.

Or it can be a script (either Bitcoin script or simplicity), then the spending conditions can be further refined (HTLCs etc).

With a taptree construction and a top level pubkey, the mint only learns the script path that was used, not all the defined ones.