The new ISPConfig 3.2.9 release comes with support for Ubuntu 22.04, which also includes support for PHP 8.0 and 8.1 as the default PHP version of the operating system. We also updated the ISPConfig auto-installer now, so it can be used to install ISPConfig on an Ubuntu 22.04 system.
You can find the updated installation guide for ISPConfig on Ubuntu 22.04 here:
https://www.howtoforge.com/ispconfig-autoinstall-debian-ubuntu/