I would think there must be more to it than that. Onkyo has essentially disappeared from the market and Pioneer isn’t too far ahead of them. Marantz, Denon and other brands seem to have little product availability. I would think Covid might affect supply and demand more or less equally, but what I see seems to be more of a supply issue. Most lower end hi-fi production is spread all over Asia: China, Japan, Viet Nam, Thailand, Malaysia, Taiwan...but the shortages seem to not be limited to specific countries of origin. Whatever the cause or causes, I hope it gets sorted out soon.