Yes, Echidna supports biometric login to SharePoint by using Active Directory Federation Services (ADFS) Plug-In where the Echidna server provides two-factor authentication (2FA), which is stronger than passwords.
By using Echidna’s Active Directory Federation Services (ADFS) Plug-In, users can authenticate into SharePoint using an Echidna supported security token, such as Salt Mobile on devices that support biometrics hardware for a biometric login.