No, our Piano OAuth integration does not require a scope value.
You don't need to pass the scope value with the request, we don't use it in our software. You just need to provide the client_secret or api_token to authorize the request.
We don't support the scope of OpenID - which is an identity layer built on top of the OAuth 2.0 framework. Identity Management is not an OIDC provider but does support OAuth 2.0.