Sulu CMS - Visiblity condition from underlying value of resource single selection

I have three entities Provision, Gatekeeper and Data.

class Provision {
    private Gatekeeper $keeper; // ManyToOne
    private Collection $points; // ManyToMany
}

class Gatekeeper {
    private int $id;
    private string $name;
    private bool $allowData;
}

class Data {
    private int $value;
}

All entities have REST-CRUD logic implemented. In order to edit the Provision entity I've added configurations to the sulu_admin.yaml:

sulu_admin:
  field_type_options:
    selection:
      data_selection:
        default_type: 'list_overlay'
        resource_key: 'data'
        types:
          list_overlay:
            adapter: 'table'
            list_key: 'data'
            display_properties: ['value']
            icon: 'su-plus'
            label: 'app.data'
            overlay_title: 'app.action.select.data'
    single_selection:
      single_gatekeeper_selection:
        default_type: 'single_select'
        resource_key: 'gatekeepers'
        types:
          single_select:
            display_property: 'name'
            id_property: 'id'
            overlay_title: 'app.action.select.gatekeeper'

Now, in the form configuration file for Provision entities, I want to include a visibleCondition for the data list:

<form xmlns="http://schemas.sulu.io/template/template"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://schemas.sulu.io/template/template http://schemas.sulu.io/template/form-1.0.xsd">
    <key>provision_details</key>
    <properties>
        <property name="gatekeeper" type="single_gatekeeper_selection" mandatory="true">
            <meta>
                <title>app.gatekeeper</title>
            </meta>
        </property>
        <property name="data" type="data_selection" visibleCondition="!!gatekeeper && gatekeeper.allowData">
            <meta>
                <title>app.data</title>
            </meta>
        </property>
    </properties>
</form>

Is there any possibility to implement this behaviour? I've already tried adding a custom ConditionDataProvider, but the main problem is that the visibleCondition is evaluated at Field-level while the only place I could pull the required data from would be the ResourceListStore in the SingleSelect.

This is not possible you only have access to the raw form data. For a single selection the gatekeeper value contains only the id of the selected element. Not any data of the element behind this element.

All data you have access to it, you see in save (POST/PUT) request of the form.

The only thing which is possible would be using resource_store_properties_to_request to filter the result of your data_selection by the gatekeeper id, this requires that your data api need to keep the gatekeeper parameter in mind to filter by it:

    <properties>
        <property name="gatekeeper" type="single_gatekeeper_selection" mandatory="true">
            <meta>
                <title>app.gatekeeper</title>
            </meta>
        </property>

        <property name="data" type="data_selection">
            <meta>
                <title>app.data</title>
            </meta>

            <params>
                <param name="resource_store_properties_to_request" type="collection">
                    <param name="gatekeeper" value="gatekeeper"/>
                </param>
            </params>
        </property>
    </properties>