This should be clarified to add that only 'intra" (within the same server) copies are added. There is no support for inter (between different NFS servers) copies in RHEL8. The support for inter-server to server copies was added in RHEL9. For more info, see https://access.redhat.com/solutions/7027105 and the bugzillas in the "Private Notes" section as well as https://datatracker.ietf.org/doc/html/rfc7862#section-1.4.1

Reported by: rhn-engineering-dwysocha

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/managing_file_systems/exporting-nfs-shares_managing-file-systems#annotations:842f8bd8-379d-4486-8eff-662eb348bfe0