How to save applications to a separate folder in django 3.2.1?

Question

Django

Updated django, and now I don't understand how you can save all files in a separate folder, and not in the project folder.
this code doesn't help anymore:

import os
import sys

PROJECT_ROOT = os.path.dirname(__file__)
sys.path.insert(0, os.path.join(PROJECT_ROOT, 'apps'))

In the new jung, os is not even imported out of the box, and everything is done through path.
Throw off a link to the tutorial, or explain how it's done, thanks in advance!