I had installed Automation Suite in our Linux Server last year. Although not all, I’ve added my comments / clarifications to some of your questions below;
Can you clarify what do they mean by source and destination? I hope it’s not about how a user / bot would access the Automation Suite FQDN, because that will just require a DNS entry and in some cases a firewall port opening.
Does it mean that your Automation Suite will be behind an F5?
Most likely yes, unless you’re using a CI/CD pipeline to run the installation, you might require a temporary sudo root access to install.
I will let UiPath experts answer this, but from my understanding, the NFS is configured for the cluster backup and it doesn’t backup the database or even the external object store (if you are using any). So you’d still require an SQL backup from your organization.