I want to establish an integration between Appian and mulesoft using OAuth2.0 authorization but I cant find the key or secret anywhere on Runtime Manager dashboard.
I know there's a prebuilt integration for Appian built by MuleSoft but for my requirement, I cant use that.
There is not a single way to implement OAuth 2.0 in Mule applications so it will depend on your application and features from different MuleSoft products that you may be using. Runtime Manager is used only to manage deployment and execution of applications. That does not include OAuth nor API features. If you have API Manager in your subscription you could use policies to apply an OAuth policy to a Mule application that implements an API.