Add <SingleLogoutService> to IdP metadata?

Greetings.

I'm not a SAML expert at all but I had to work with a service provider that uses it (for testing purposes). At some point, the system complained that the IdP XML metadata didn't contain a logout URL. Using Copilot to help me out, I basically copied these lines:

<md:SingleSignOnService Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect" Location="https://mocksaml.com/api/saml/sso"/>
<md:SingleSignOnService Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST" Location="https://mocksaml.com/api/saml/sso"/>

... and pasted them below, after changing the element name from SingleSignOnService to SingleLogoutService:

<md:SingleLogoutService Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect" Location="https://mocksaml.com/api/saml/sso"/>
<md:SingleLogoutService Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST" Location="https://mocksaml.com/api/saml/sso"/>

I don't know if that's correct/mandatory/useful? This seems to work with the service provider I'm using though. Is https://mocksaml.com/api/saml/sso receptive to logout SAML messages?

The issue does not identify a file, test, or entry point. First verify how the IdP metadata is generated and whether SingleLogoutService is required for the reported service provider; confirm whether the advertised endpoint accepts logout SAML messages. Done means the metadata behavior and logout endpoint support are documented or implemented with a clear validation case.