Was LDAP Channel Binding and LDAP Signing ever enforced by default?

I came across the post below about LDAPS. Is it enabled by default, or has it been delayed?

https://pleasantpasswords.com/info/pleasant-password-server/i-ldap-and-ad/secure-ldap-is-mandatory-for-active-directory#:\~:text=Security%20Requirement%20Changes&text=LDAPS%20should%20be%20used%20with,changes%20or%20windows%20security%20updates.