Hey there! I see you also posted here:
How can I fix this issue in WHM/Cpanel with Ubuntu 20.04? The documentation says to use the BlueHost fix but that it's not optimal for fixing the issue. Cloudlinux has several methods to fix it. Th...
Since this is related to Apache, it's really not up to Ubuntu to decide how to handle this.
For an Ubuntu system, the BlueHost patch is the only option currently available. If you feel you need additional protection, it might be worth switching to a Redhat-based operating system. Since the other more exhaustive options are kernel-based, they just aren't available for Ubuntu.