Welcome to the Auth0 Community!
You can view these values under our documentation about Enterprise Connections. To save you a bit of time, they would be:
ad
(Active Directory/LDAP)adfs
(ADFS)auth0-adldap
google-apps
(Google Workspace)ip
office365
oidc
(OpenID Connect)pingfederate
(PingFederate)samlp
(SAML)sharepoint
waad
(Microsoft Azure AD)
Hope this helps! If you have any other questions, feel free to let me know!
Kind Regards,
Nik