No. This is a published benefit which explicitly states it is for Enrich members, does not state OWS / OWE. It’s linked via the wiki here too:
Malaysia Golden Lounges at KLIA (Post Renovations)

While the lounge personnel potentially may make decisions not always aligned to policy, my experience in the handful of times I as an OWE have stopped in as an arrivals passenger on a J flight has been that they give me access to the J side of the lounge. I’ve never tried as an arriving Y passenger, but expect the same principle would apply - i.e. OW status would not help.