Django json api ordering_fields not working on include resources

Hi I am working on ordering_fields on include resources using django_json_api. I have 2 models activities and activity_enrollments(activity is foreign_key). I am ordering on 2 fields one is related to activity.priority and next is activity_enrollment.is_targeted. is_targeted field order is working fine but activity__priority is not working

I have tried multiple columns in activity_enrollment model these are i am able to sort it. but related fields are not working

viewset

from rest_framework_json_api import filters
from rest_framework_json_api import django_filters
from rest_framework.filters import SearchFilter
from rest_framework import status, viewsets
from .models import ActivityEnrollment, Activity
from .serializers import ActivityEnrollmentSerializers

class EnrollmentsViewSet(viewsets.ModelViewSet):
    """
    A simple ViewSet for viewing and editing accounts.
    """

    queryset = ActivityEnrollment.objects.all()
    serializer_class = ActivityEnrollmentSerializers
    filter_backends = (filters.QueryParameterValidationFilter, filters.OrderingFilter,
                      django_filters.DjangoFilterBackend, SearchFilter)
    ordering_fields = ("activity__priority","is_targeted",)

serializers

from .models import ActivityEnrollment, Activity
from rest_framework_json_api.serializers import ModelSerializer

class ActivitySerializers(ModelSerializer):

    class Meta:
        model = Activity
        fields = (
            'id',
            'name',
            'priority',
        )


class ActivityEnrollmentSerializers(ModelSerializer):
    included_serializers = {
        "activity": ActivitySerializers
    }

    class Meta:
        model = ActivityEnrollment
        fields = (
            "id",
            "is_targeted",
            "completed_at",
            "activity"
            )
    class JSONAPIMeta:
        included_serializers = ['activity']

api:

GET /api/activity-enrollment/?include=activity&sort=-activity__priority

response

{
    "links": {
        "first": "http://127.0.0.1:8908/api/activity-enrollment/?include=activity&page%5Bnumber%5D=1&sort=-activity__priority",
        "last": "http://127.0.0.1:8908/api/activity-enrollment/?include=activity&page%5Bnumber%5D=1&sort=-activity__priority",
        "next": null,
        "prev": null
    },
    "data": [
        {
            "type": "ActivityEnrollment",
            "id": "3",
            "attributes": {
                "is_targeted": false,
                "completed_at": "2025-01-06T17:08:00Z"
            },
            "relationships": {
                "activity": {
                    "data": {
                        "type": "Activity",
                        "id": "3"
                    }
                }
            }
        },
        {
            "type": "ActivityEnrollment",
            "id": "2",
            "attributes": {
                "is_targeted": true,
                "completed_at": "2025-01-14T17:08:00Z"
            },
            "relationships": {
                "activity": {
                    "data": {
                        "type": "Activity",
                        "id": "62"
                    }
                }
            }
        },
        {
            "type": "ActivityEnrollment",
            "id": "1",
            "attributes": {
                "is_targeted": false,
                "completed_at": null
            },
            "relationships": {
                "activity": {
                    "data": {
                        "type": "Activity",
                        "id": "1"
                    }
                }
            }
        }
    ],
    "included": [
        {
            "type": "Activity",
            "id": "1",
            "attributes": {
                "name": "test1",
                "priority": 1
            }
        },
        {
            "type": "Activity",
            "id": "2",
            "attributes": {
                "name": "test2",
                "priority": 62
            }
        },
        {
            "type": "Activity",
            "id": "3",
            "attributes": {
                "name": "test3",
                "priority": 3
            }
        }
    ],
    "meta": {
        "pagination": {
            "page": 1,
            "pages": 1,
            "count": 3
        }
    }
}
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