Starting today, you may install PHP 8.1 Release Candidates by choosing "PHP 8.1 RC" while creating a new server. Or, you may install the release candidate on an existing server via the PHP tab on a server's management dashboard. Some Forge features, PHP features, and PHP extensions may not work as expected when running applications using PHP 8.1. In addition, after PHP 8.1's stable release you will need to uninstall and re-install PHP 8.1 via the PHP tab on a server's management dashboard.
Forge allows you to painlessly create and manage PHP servers which include MySQL, Redis, Memcached, database backups, and everything else you need to run robust, modern Laravel applications.