How to override the autocomplete view for a specific model field in the Django admin?

Question

I need to override the way a Select2 widget of a particular ForeignKey is behaving in the Django (4.1) admin.

Namely, I am trying to increase the number of objects returned by the AJAX requests and defined by paginate_by in AutocompleteJsonView.

Sadly this great solution no longer works with Django 4.

How can I extend AutocompleteJsonView and somehow tell Django to use my custom view?

EDIT: my current workaround is to override get_paginator on the ModelAdmin by setting paginator.per_page to whatever value is suitable, but that doesn't answer to broader question of customising the autocomplete behaviour of Select2 widgets in the Django admin.