Drupal 11 development has reached a point where the system requirements are being raised in the development branch. To prepare core developers for this and to inform the community at large, we are announcing the following requirements for Drupal 11. … Drupal 11 will require PHP 8.3 and older versions of PHP are not supported. … The minimum database requirements for backends supported by Drupal 11 are MySQL 8.0 …
Source: Drupal 11.0 will require PHP 8.3 and MySQL 8.0