It needs when implementing ECDAA(e.g. #278 (comment)).

tpm2_commit(1) - Performs the first part of an ECC anonymous signing operation. The TPM will perform the point multiplications on the provided points and return intermediate signing values. The signing key is an ECC key. The key cannot be a sign+decrypt key and must have an anonymous signing scheme. TPM_ALG_ECDAA is the only supported anonymous scheme.

https://manpages.ubuntu.com/manpages/jammy/man1/tpm2_commit.1.html