In case anyone else is wondering, Veeam Agent for Linux 2.0 installs and works on Fedora 28, which has only just been released
Specifically, I have installed Fedora 28 into a VMware Workstation VM, from the live media. Clean install to hard drive, updates after a reboot, then installed Veeam Agent for Linux and configured/ran a backup to a Veeam B&R server repository.
I'll now upgrade my laptop with some confidence that backups will still work.
Only posting this because Fedora 28 is so new and thought other people might be interested.