FIDO2 CTAP hmac_secret extension

I know the NitroKey 3 supports FIDO2 but does it have support for the HMAC Secret extension?

For Platform Authentication, this CTAP defined extension is used by the platform to retrieve a symmetric secret from the authenticator when it needs to encrypt or decrypt data using said symmetric secret.

Yes, the Nitrokey 3 supports the hmac-secret extension.