This issue can be caused by a few factors—including feature rollouts, admin settings, or client versions—so here are some steps to help troubleshoot and enable the Chat and Channel settings:
Verify that you’re running the latest version of Teams.
• In Teams desktop, click your profile picture in the upper right corner and select “Check for updates.”
• If an update is found, install it and restart Teams.
Confirm that your organization hasn’t disabled these options.
• Sometimes Teams features (including settings for muting inactive channels) are managed by your IT admin through policies in the Teams admin center.
• Contact your IT/Teams administrator to ask if any recent policy changes might be hiding the Chat and Channel function from your settings.
Check if the feature is part of a new or preview rollout.
• Teams frequently tests new UI designs and settings; occasionally, features might be temporarily removed or relocated as part of a preview.
• Ask around in your organization or check your organization’s internal communications to see if there’s an announcement regarding a feature update.
Sign out and back in (or reinstall Teams).
• Sometimes cache issues or corrupted settings can hide newly released options.
• Give signing out or reinstalling the client a try to see if the settings reappear.
Use the Teams web client.
• Occasionally the desktop client’s settings might differ slightly from the web version.
• Log into Teams from a web browser (teams.microsoft.com) and check your settings there to see if the Chat and Channel options are available.
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