Is there a way to manually sort items in the playlist within the Channels app on an ATV 4K? Thanks.
On iOS, yes. On tvOS, no.
On iOS, you can drag and drop the items, but only if the sort type is set to Custom.
You can sort on a Windows PC and on my Android phone through the Web settings too. Just wish it worked on the Apple TV, since you can add stuff with it.
Unfortunately, tvOS doesn't make it easy to do that as it's pretty ignored by Apple's engineering 