You cannot, restoring deleted channels is currently a client-only operation (i.e. you need to use the Teams client, as an owner of the team where the channel was located).
Retreive deleted teams channel
How do i restore a deleted Teams channel in the admin portal
Microsoft Teams | Microsoft Teams for business | Other
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Vasil Michev 119.9K Reputation points MVP Volunteer Moderator
2024-12-27T15:56:19.78+00:00 -
Anonymous
2024-12-30T01:36:17.8333333+00:00 To restore a channel that was previously deleted, along with all the conversations and content:
Go to the team that the channel was in and click More options
> Manage team.
Select the Channels tab at the top of the view.
Scroll down to Deleted and expand the list of channels.
Select Restore next to the channel you want to restore.
On the confirmation screen, select Restore.
Channels can be restored within 21 days of deletion, but no new channels can be created with the same name as the deleted channel within that 21-day window.
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