We improved the GraphQL Content API to expand the filtering and ordering capabilities for collections. With this improvement, you can:

• filter any collection, if the reference field has a validation rule that makes it only accept a single content type.
• order any linkedFrom collection, except entryCollection.
• order any collection, if the reference field has a validation rule that makes it only accept a single content type.
• skip over unresolved entries.

For more information about this improvement, see the Relational filtering with the GraphQL Content API section and the GraphQL Content API page.