https://www.cnet.com/news/apple-rumored-to-split-up-itunes-in-forthcoming-macos-release/

This follows Apple's March announcement that it will soon bring its updated TV app to MacOS, as well as smart TVs, Roku and Amazon Fire TV.

Developer Guilherme Rambo, writing for 9to5Mac, backs up Troughton-Smith's account. He adds that the new standalone apps for music, podcasts and TV will debut in MacOS 10.15, the presumed successor to the current release. Rambo also says that Apple has redesigned the Books app, which will feature dedicated Library, Book Store and Audiobook Store tabs.