Syncing favorites should also include syncing the order. Having to move the favorites around to be in the same place across half a dozen+ iOS devices and Apple TVs gets old very quickly. Ideally...using iCloud for storing favorites information AND order.
Huge pain point in what is otherwise a great setup experience.
What do you mean by syncing order?
You can change the order of the favorites, so those that are your favorite favorites are listed first. (Or perhaps you want them in alphabetical order as opposed to being sorted by channel number. Or maybe .... You get the idea.)
I keep learning new things! My Favoriting was done via the HDHR, so didn't even know you can re-order.
I just found out it does not pull from HDHomeRun after I change the HDHomeRun. You said in Jan 18 that you planned to improve syncing this year. Did anything happen where I need to change a setting? I like the idea of being able to have some Apple TV's with there own favorites. But would be nice to have an option to have it resync with the DVR/HDHomeRun.
With addition of TVE I’m having a really hard time keeping favorites synced across all devices. It would really be great to just have a simple button to click on the clients to say sync to DVR server.
Workin’ on it 
Was this included in V4.0? If so, how does it work exactly. Trying to get all our Apple TVs setup the same for favorites and channel order and I think I've made a mess of it between settings in HDHR, Server, and the Apps.
Not yet.
I thought I saw a feature in the settings about loading or backing up something? What is that?
I don't see anything like that in the stable 4.0 release. Nor do I see anything in the latest beta.
There is a feature akin to this in the Android betas, but the unified syncing has not been completed.
Maybe I saw it in the Android beta. I'll try again when I get a chance and get specific about what I'm talking about. Can you shed light on what the hierarchy of Hide/Favorites is? That would help. I can set Favorites/Hide in numerous different places and not sure what if anything flows. With my providers there also seems to be a lot of overlapping channels... for example some of the free streaming channels also show up in HDHomerun. I've got two identical HD Homeruns too. I just have no idea what is supposed to happen when I make these settings changes and what takes precedent.
I just learned this: You can add channels to your favorites on the Settings tab, then click and hold to reorder via On Now > Favorites.
Any news on this? Seems like it was in progress at one point, would love to have all my Apple clients respect the HDHR favorites.
Doesn’t seem to work when I try this? Just gives me option to manage channel which allows me to favourite or hide
Would you happen to be on an Apple TV with tvOS 14.3? Apple broke the feature in the current OS version, but it will return when Apple releases 14.4 with the fix.
Is there a list somewhere of clients thst sync with the dvr server and ones that dont? I set my favorites on the dvr server itself in channel management. On iOS app, I can select favorites and it gives me the favorites I set on the server If I am on Android tv there are no favorites I have to set them all over again on the remote device.
Not sure how to tell if I’m doing something wrong or if that is just the expected behavior.
Just use the Import option on the client.
Well that was tough to find. I went through Manage Sources, General, Library, Playback, Support, and Debug and didn't see anything about importing favorites. Went back and went to each independent source inside the Manage Sources menu and found a sync option. Thanks for the tip, didn't see that documented anywhere!
I found it easier to hide the 'Favorites' category using the server side settings, and then create a Channel Collection called Favs. Add the channels I want as a favorite in there, set the order I want and then it's there on all clients, always updated and in the same order.