Why does Django rest framework display the internal serializer incorrectly?

Question

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Actually the problem is that in the view I get the "relationship" field instead of the internal serializer.
models.py

from django.db import models
from django.contrib.auth.models import User


class Profile(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE, verbose_name='User', null=True, blank=True)
    first_name = models.CharField('First name', max_length=50)
    last_name = models.CharField('Last name', max_length=50)
    phone_number = models.CharField('Phone number', max_length=15)
    activated = models.DateTimeField('Activated')

    def __str__(self):
        return f'<Profile {self.first_name.title()} {self.last_name.title()}>'

serializers.py

from rest_framework import serializers
from .models import Profile

from django.contrib.auth.models import User


class ProfileSerializer(serializers.HyperlinkedModelSerializer):
    class Meta:
        model = Profile
        fields = ('id', 'first_name', 'last_name', 'phone_number')


class UserSerializer(serializers.ModelSerializer):
    profile = ProfileSerializer()

    class Meta:
        model = User
        fields = ('id', 'email', 'username', 'profile')

views.py

from rest_framework.views import APIView
from rest_framework.response import Response
from django.contrib.auth.models import User

from .serializers import UserSerializer
from .models import Profile


class UserViews(APIView):
    def get(self, request, format=None):
        users = User.objects.all()
        serializer = UserSerializer(users, many=True)
        return Response(serializer.data)

Well, the url is attached by itself. When I go to api/v1/users/ I want to get the profile field in the attributes as a serialized object, i.e. something like this

{
    "data": [
        {
            "type": "UserViews",
            "id": "1",
            "attributes": {
                "email": "",
                "username": "admin",
                "profile": {
                     "id": 1,
                     "first_name": "name1",
                     "last_name": "name2",
                     "phone_number": "[phone]",
                 }
            },
        }
    ]
}

But for some reason I get the following:

{
    "data": [
        {
            "type": "UserViews",
            "id": "1",
            "attributes": {
                "email": "",
                "username": "admin"
            },
            "relationships": {
                "profile": {
                    "data": {
                        "type": "Profile",
                        "id": "1"
                    }
                }
            }
        }
    ]
}

What should I fix so that the internal related object is returned correctly (as in the example)? After all, as far as I know, serialization does not require binding to view.