No, you would not need to change anything regarding Allowed URIs.
By simply adding the parameter when calling the /authorize endpoint of the Authorization API. This is mentioned here.
Otherwise, you can take a look at the code samples provided in the following community posts regarding the same issue:
- Logging out the user and redirecting them
- Redirecting user after user consent
- Allow user to log in using different address if consent is declined
Let me know if these are helpful or not!
Kind Regards,
Nik