I know FM has this so I'll suggest it for PM as well.
It would super convenient to be able to setup call forwarding via the Self-Serve Site.
Because the roaming options are pretty limited, if one forgets to setup forwarding to a wifi number/non-PM sim before they leave an area where they have PM service, they are out of luck until they are back in PM territory. This would be rather frustrating if one went to Europe for vacation and only realized once there that they had forgotten to setup forwarding beforehand.
At least in that situation if this were implemented then the forwarding could be set once wifi was available.
Please consider. 🙂