Hi Tito J
Show, hide, or pin a team or channel in Microsoft Teams.
There are three viewing options for teams and channels: show, hide, and pin. Channel posts can also be pinned.
Show a team or channel
When you join a new team, it's automatically shown in your teams list. If you're a member of a team but you don't see it, do the following:
On the left side of Teams, scroll to the bottom of your teams list, and select Hidden teams.
Locate the team you're looking for.
Select More options More options icon> Show.
Hide a team or channel
If you don't want a team or channel to show in your teams list, hide it. This is a great way to clean up your list and focus on the teams and channels you're active in.
Go to a team or channel name and select More options More options icon> Hide.
You can also show channels from the hidden channels menu beneath the channels list of a team. Select More options More options icon> Show.
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I pulled the following steps from the link below.
https://support.microsoft.com/office/91a37043-acea-49b0-9dfc-aec37b2e92b8 "
I hope that the information provided has been helpful to you. If you have any further questions or concerns, please feel free to ask.
Warm regards Segunfunmi