Templates and static folders missing in installed package

After following along the Advanced tutorial, I packaged my django-polls app successfully under dist/django-polls-0.1.tar.gz. However, when I went to mydjangoapp project and installed the django-polls app, I checked it was installed under mydjangoapp/.venv/lib/python3.9/site-packages/polls. But its templates and static folders are missing. It’s strange as the two folders are all included in the django-polls-0.1.tar.gz. What was going wrong with my installation?