Currently we have Teams defaulted to show you the first (up to five) channels ever created. If you want to add more channels to your left rail view, just click the ellipses next to the channel name and select “Favorite”. When you favorite the channel, it will then be “pinned” to your left rail under that team name.
Try that and let me know if that meets your needs!
Hiding things adds a layer of obfuscation and will discourage our new users from using teams, they need simplicity and clarity.
I hate to be the bearer of bad news, but this feature request has been declined.
This request has been reviewed and declined by the feature team.
You can continue to up vote this topic as well as leave comments. Depending on the ongoing feedback, there is always a chance a topic will be revisited based on user demand.