https://wccftech.com/apple-stops-selling-audio-products-from-bose-and-others-as-it-prepares-to-launch-airpods-studio-and-homepod-mini/

Apple has stopped selling speakers and headphones from brands like Bose, Sonos, Logitech, and others, at its retail and online stores, as it prepares to launch its rumored new audio AirPods Studio headphones and HomePod mini speaker.

Apple has always sold headphones and speakers from third-parties, including Beats before it was acquired by the company, as accessories for its own products. However, Apple is going all-in with its own branded audio products now after the success of AirPods. Although HomePod is not as successful, primarily because of its price, and availability in only 3 countries around the world, the company has removed competing products from its online store. As per Bloomberg, Apple's retail store employees have also been asked to remove headphones and speakers from other brands.