In case of any doubt, here is the OW lounge access page:
https://www.oneworld.com/ffp/lounge-access
Your particular attention is drawn to the sentence:
Some lounges may get busy at peak times, and access to them may be restricted as a result.
And regarding the QR lounge issues that have cropped up:
Qatar Airways’ Al Safwa First and Al Mourjan Business lounges in Doha (DOH) and Qatar Airways’ Premium Lounges at London (LHR) and Paris (CDG) are excluded.