I see "rpool" in my CLI when i run "zpool status" but the drop down list for resources when creating VMs/CTs is empty. How do i fix this? Cant seem to find solution online.
Not sure what you are trying to achieve. In the first screenshot we can see "Resource Pool". But are you trying to assign the VM to a resource pool? As far as I understand it's not about disks.
So I guess you want to create a disk for the VM.
If so, it's being done in the fourth link: "Disks".
"A resource pool is a set of virtual machines, containers, and storagedevices. It is useful for permission handling in cases where certain usersshould have controlled access to a specific set of resources, as it allows for asingle permission to be applied to a set of elements, rather than having tomanage this on a per-resource basis. Resource pools are often used in tandemwith groups, so that the members of a group have permissions on a set ofmachines and storage."