@thomas-wood "Remotes" are for XO backups and SR are for VM Storage. Once you add a SR to a pool it's available to all hosts. Also, all hosts should be able to access the IP of the NFS server before setting that up.
I have a video explaining storage in XCP-ng here:
https://youtu.be/xTo1F3LUhbE?si=QHYkABgElsEVOj6H