If you’re a team owner, you can automatically favorite up to 10 channels for the whole team, making them show up automatically in everyone’s channels list so people will be aware of important channels.
There are two ways to do this. When creating a new channel, select Automatically favorite this channel for the whole team below the description box.
You can also add or remove auto-favorited channels by clicking More options next to the team name, selecting Manage team, and then opening the Channels tab.
To see auto-favorited channels on mobile, you might have to sign in to the desktop or web app first.
For now, go to your desktop or web app to auto-favorite channels for your team.