In Guide I don't see a way to change focus to select between the categories of channels (All, HD Channels, SD Channels, Favorites...).
Press Menu and the sidebar is shown. I'm not finding a way to swipe to it.
In On Now, a single menu press takes me to the top tab bar but Guide does not work that way...
I'm running tvOS 14.3 18K561 and the current release Channels app.