Hey there Donald Bruce
Thats a good question and thanks for using QandA platform
So In Teams, once a channel or its content has been deleted, it typically cannot be restored even directly by an admin.
If your organization has configured retention policies for Teams, chat messages, channel messages, and other types of content may be retained for a specified period even after deletion. In such cases, admins can recover deleted content within the retention period.
So in summary I guess its not possible to get back a deleted channel.
If this helps kindly accept the answer thanks much.