Contextual data for repeater field with a relationship

[furai]

Hey,

Let's say on a customPostType I have a ACF group and within that group there's a repeater with post object relationship field.

This relationship field holds another customPostType2 that has various fields attached to it with data some of which are meant to only be displayed for certain customPostType ids.

How can I register a connection/filter out things so only data meant for the parent customPostType are retrieved from the child customPostType2?

What is the best approach here?

To give you some idea an example GraphQL query:

query customPostType {
  customPostType(id: "/cpt/url//", idType: SLUG) {
    __typename
    uri
    customPostTypeProperties {
      authorByline
      listOfServices {
        fullTitle
        badgeTitle
        service {
          ... on Service {
            title
            serviceProperties {
              monetizations {
                status
                customPostType {
                  ... on CustomPostType {
                    uri
                  }
                }
                pricing {
                  __typename
                  ... on Service_Serviceproperties_ServiceMonetizations_Pricing_Affiliate {
                    affiliateCta
                    affiliateLink
                  }
                  ... on Service_Serviceproperties_ServiceMonetizations_Pricing_Widget {
                    widgetCta
                    widgetExclusive
                    widgetId
                  }
                }
              }
            }
          }
        }
      }
    }
  }
}

What I'm trying to achieve is to get pricing data only if monetizations customPostType has the same id as the parent customPostType.
Where can I hook to modify resopnse having all the context? Should I try registering custom connection? I tried the latter but couldn't get meta_query to work. https://www.advancedcustomfields.com/resources/query-posts-custom-fields/#examples i wanted to get data in a way that is described in the 4th example.

Maybe there's better way to do it?

Any tips appreciated. I don't need concrete answers.

Cheers,
Furai