No, you don't, at least not in the sense of "Facebook approves your use case based on some subjective criteria." Per the page you linked, as long as you verify

No, you don't, at least not in the sense of "Facebook approves your use case based on some subjective criteria." Per the page you linked, as long as you verify your ID/location, are from one of the countries where the Ad Library has launched, and agree to the Facebook Platform Policy, you can get access.