On YouTube TV, Cartoon Network USA and Adult Swim USA have been separated into distinct networks, before (and like any other pay-TV provider) they were previously housed together under a single timesharing channel.

YouTube TV has yet to give an official reason, but it is likely due to an upcoming package restructure, Adult Swim will be in the cheaper Entertainment plan, and Cartoon Network will be in the more pricier Entertainment + Family plan, which also includes Nickelodeon and Disney Channel.

Article by ComicBook.com, with supplementary info from the official YouTube blog, link on the following post.

Source: https://x.com/RegularTweetsUK/status/2028929537879527491