Beta testing of Okta apps

I have couple of questions:
1 - Is it possible to release a beta version of Okta app so our customers can test and provide feedback? If yes, what are the guidelines around that? For e.g. what quality level is expected from such an app? Our goal is to iterate on the app from Beta to GA.

2 - Is possible to provide the app to a select few customers only?
Or add a custom message within the application (say Provisioning section) that this is for beta testing only?

Thanks in advance!