Selje is a harbour, not an airport, so there is no lounge to speak of at QFK. This code marks a coastal stop on Norway's exposed Stad peninsula, a working harbour built around ferry and fishing traffic rather than passenger terminals, jet bridges, or waiting rooms of any kind, lounge or otherwise, and no amount of searching will turn one up here.
The ground-side reality at a harbour like Selje is entirely different from an airport's. There is no security checkpoint, no departures hall, and no landside-versus-airside split for a lounge to sit inside in the first place. Travelers passing through are typically moving between ferry connections along the Norwegian coast or continuing by road, and the closest thing to a waiting area is a harbourside cafe or the ferry terminal's own seating rather than anything resembling an airline lounge.
For travelers in this stretch of western Norway who do want a genuine airport lounge experience, the real options sit some distance away by road. Bergen Flesland Airport to the south and Alesund Airport, Vigra to the north are the region's actual commercial gateways, with scheduled domestic and some international routes and the conventional airport infrastructure, check-in, security, and airside facilities, that a harbour stop like Selje was never built to have. Neither airport should be assumed to carry a sprawling lounge network on the scale of a major international hub, and whatever lounge access either does offer still depends on your airline status, fare class, or a qualifying card program, so confirm the specifics directly with the airline before you travel.
If your route takes you through Selje's harbour, plan your comfort stop around the ferry terminal or a nearby cafe, and build your actual pre-flight lounge expectations around Bergen or Alesund instead, since that is where the region's real airport infrastructure begins.