Summer is a hard time to get service, everyone wants it done right now so they can get out camping, add that some parts are on back order can make it even harder. Plus COVID is still an issue for employers, just finding employees can be a challenge.
So some dealers do priorities their customers first, but the ones around here will still do warranty work. Without knowing the problems it's had to give much thought to going back to the manufacturer, but that does happen in some extreme cases. Could be the dealership is to backlogged, doesn't have qualified staff or they just don't want to deal with it. They should also be talking to the manufacture or their selling dealer too. Most manufacturers will have some type of a regional rep, they may even refer them to another dealer.
Where about in WA are they at?