Some [Some] current Amazon Products, Sonos, BluOS products, Marantz, Denon, etc. [Note: they may have restricted maximums for resolution / decoding]
https://www.whathifi.com/us/news/first-wave-of-product-support-for-amazon-music-hd-confirmed
https://positive-feedback.com/industry-news/bluos-among-first-to-integrate-amazon-music-hd/
https://www.whathifi.com/us/news/first-wave-of-product-support-for-amazon-music-hd-confirmed
https://positive-feedback.com/industry-news/bluos-among-first-to-integrate-amazon-music-hd/