You still haven't said if you applied Outland or Inland, but from your question I am going to infer Outland. No, that approval after 42 days (60 now) has nothing to do with the applicant, it is approving your wife to sponsor you. You will NOT be able to work when she is approved, Outland applicants cannot work until approved for PR, unless they obtain a work permit.
If you applied Inland, then you are confusing the two processes. Inland applications are reviewed 10-11 months after received for Stage one approval or Approval In Principle (AIP). You may apply for an open work permit after receiving AIP if you did not already send your application attached to your PR application, but you will have to wait the 10 or so months until you receive AIP in that case.