In a hybrid deployment, EDVs are associated with specific data planes. For security reasons, the set of data planes which can be used with an EDV does not change automatically. However, you can edit it by modifying the PVCs present in the relevant data plane, then editing the EDV as explained below.
Create the PV and PVC in the new data plane, with names matching the PVC already used for the EDV.
Click the three-dot menu on the right side of the EDV table for the EDV that you wish to modify, then click Edit.
You will see the new data plane at the bottom of the modal, highlighted in green to indicate that it is being added to the EDV:
If you do not see the new data plane, confirm the name of the PV and the name and label of the PVC.
Click Update to update the EDV and add the new data plane.