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!
SuphatraBenjamin supported this idea ·Benjamin commented
I have 2 teams, one with 5 channels and one with 2 channels. For both teams, instead of showing all channels, one of the channels is always hidden, instead there is the "1 more channel" link, which takes up the same space as the one "missing" channel would! I have more than enough free vertical space in the teams window, so this behaviour is irrational and infuriating. Simply bad UX.