CiviCRM follows the Drupal community's decisions around which versions of Drupal receive support. Drupal 8 is no longer supported, but Drupal 7 and Drupal 9 are supported. Drupal 10's release date is targetted for August 2022 (as of April 2022), and the CiviCRM community anticipate providing support for it around the time of its release.
This guide covers standard installation of CiviCRM on an existing Drupal 8 or 9 site. It assumes that you previously completed these tasks:
1. [Install Drupal 8 or 9](https://www.drupal.org/docs/8/install), and...