How do I filter in URL a serializer when it's nested in another serializer In Django?

I'm creating an API that has nested data like in the picture Now how to search nested data in URL here's my model

class Robot(models.Model):
    robot = models.CharField(max_length=100)
    short_Description = models.CharField(max_length=200)
    status = models.CharField(max_length=20)
    parameter = models.CharField(max_length=200)
    jenkins_job = models.CharField(max_length=100, default='JenkinsJobName')
    jenkins_token = models.CharField(max_length=100, default='JenkinsToken')
    def __str__(self):
        return self.robot

class assignParameter(models.Model): 
    parameterName = models.CharField(max_length=100, blank=True)
    assignRobot= models.ForeignKey(Robot, on_delete=models.CASCADE, related_name='param', blank=True, null=True)

Here's my serializer.py

from .models import Robot,assignParameter
from rest_framework import serializers

class assignParameterSerializer(serializers.ModelSerializer):
    class Meta: 
        model = assignParameter
        fields = ['id', 'parameterName', 'assignRobot']


class RobotSerializer(serializers.ModelSerializer):
    param = assignParameterSerializer(many=True, read_only=True)
    JenkinJobName = jenkinsHistorySerializer(many=True, read_only=True)
    class Meta: 
        model = Robot
        fields = ['id', 'robot', 'short_Description', 'status', 'parameter', 'jenkins_job',  'jenkins_token', 'param']

and here's my view for the api

class RobotViewSet(viewsets.ModelViewSet):
    queryset = Robot.objects.all()
    serializer_class = RobotSerializer
    filter_backends = [filters.DjangoFilterBackend]
    filterset_fields = ['robot', 'JenkinJobName__jenkinsBuildNumber']
    authentication_classes = [BasicAuthentication]
    permission_classes = [IsAuthenticated]

in the API URL if I want to search a particular robot then using this URL URL/?robot=robotname I'm able to search that particular robot. But how can I search particular nested data using URL?

using my view I'm getting search filters like this

But that is not performing any Search. how to achieve that search and what is wrong with my code can someone please help me? Actually when i search nested serializer only searched value should be present in list other should to be disappear.