@nickc So, looks like something is blocking the rpcbind protocol communication to the nfs server. Do you have a firewall or iptables rules active on the Fedora?
Try to deactivate it for tests and see whether nfs mounts works then. Typically ports 892 and 2049 are used by nfs mounts.
Just a correction: There is a typo in your post I copied and modified in mine. It must be
x-systemd.automount
and not
xsystemd.automount
in the /etc/fstab