Bekily Airport (OVA) does not operate a lounge, and no amount of searching will turn one up, because this is a small airstrip serving the Androy region of southern Madagascar rather than a hub built for connecting passengers. If you are checking whether OVA airport lounge access exists in any form, priority pass, airline, or otherwise, the honest answer is no, and it holds regardless of which specific membership or program prompted the question.
The reason has less to do with Bekily itself than with how Madagascar's domestic network is built. Flights here run through Tsaradia, the domestic carrier that links remote strips like Bekily to the capital using small turboprop aircraft, a network built around point-to-point service rather than premium terminal experiences. A strip sized for this kind of traffic simply has no reason to build lounge infrastructure, and none has been added, since the passenger volume that would justify one has never materialized on this route.
If a lounge matters to your trip, look toward Antananarivo instead. Ivato International Airport, Madagascar's principal gateway on the outskirts of the capital, is where the country's international connections and the bulk of its passenger volume concentrate, and it is the far more realistic place to expect any lounge-style amenities tied to premium fares or airline status. Bekily itself is not that airport, and travelers connecting through it should plan around Ivato for anything resembling a lounge, checking directly with whichever airline or card program they hold before assuming coverage.
At Bekily, the realistic picture for a layover or wait is simple: general seating in a small terminal building, geared toward a short wait between a domestic flight and ground transport, not a curated pre-flight experience. Build in some flexibility around Tsaradia's schedule, since domestic turboprop routings in Madagascar can shift with weather and aircraft availability, and treat the trip through Bekily as a functional connection point rather than one with any lounge amenities to plan around.