Is there a way to view the QR code after its been initially setup? For example, A user gets a new devices and needs to rescan the code, or wants the token on multiple devices.
Per se there is no way to do so. And there is no need to do so.
A user SHOULD NOT use on QR-Code (which means one seed) on multiple devices.
If he looses one phone, all his phones/tokens are compromised.
The user should enroll one token per phone!
Also why would he want to rescan. The user MUST NOT use the same qr code (the same cryptographic key) on this new phone, if he sold his old phone on ebay!
However, the could be ways using the event handler. But I better do not tell!