Django URL not mapping even there is no error why?

Question

django startproject folder (URLS.PY):-

from django.contrib import adminfrom django.urls import path, include urlpatterns = 
  [
     path('admin/', admin.site.urls),
     path('', include('sub.urls')),
  ]

django startapp folder (URLS.PY):-

from django.urls import path
  from . import views
  urlpatterns = 
  [
      path('', views.home, name= 'home'),
  ]

django startapp folder (VIEWS.PY):-

from django.http import HttpResponse
def home(request):
  return HttpResponse("hello world")