Alternate / substitute from engineering

Hello community,

 

I'm working with Alternatives/substitutions from engineering definition and I can't get the information I need:

  • In Relation widget, I can't see the relation between my Manufacturing item and these alternates/substitutes.
    • I can see the relation for manufacturing substitute/alternate though

Is it a wanted behavior?

 

Also, it seems I can't get this information from MFG webservices, those about alternate / substitute only respond with the Manufacturing substitue/alternate but I get no information about the Engineering one. How can I get this information with API then?

 

Thank you,