Try it!
Show and hide channels in Microsoft Teams to keep up with important channels and hide the ones you don't need.
Hide or show a channel
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From within the channel, Select More options
 > Hide. - 
                  
If you want to unhide the channel, select hidden channels > Show.
 
Customize channel notifications
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Select More options
 > Channel notifications. - 
                  
Choose the settings you want such as new post notifications or channel mentions.
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Select Save.
Notifications appear based on your preferred settings.