There is no homepage URL
This is the site default configuration:

/core/modules/system/config/install/system.site.yml

uuid: ''
name: 'Drupal'
mail: ''
slogan: ''
page:
  403: ''
  404: ''
  front: /user/login
admin_compact_mode: false
weight_select_max: 100
langcode: en
default_langcode: en


So if you have a Minimal install, you have to go to /admin/config/system/site-information and change the default front page.

The Standard profile overwrites this config to point it to the pre-installed front page view.