Looks like already Ubuntu 20.04 has it as a loadable module. However, it can be started only by a privileged user and it requires user space tools. So I would g

Looks like already Ubuntu 20.04 has it as a loadable module. However, it can be started only by a privileged user and it requires user space tools. So I would guess it's not running unless the sysadmin has actively configured it. Even in Linux 6.1 it is marked experimental.