Hello Sanjaya_186,
Thank you for contacting Microsoft community.
I'd like to let you know this is a peer-to-peer support forum meaning I'm just fellow regular MS forum users like you who are trying to help other MS forum users with their issues. I'm a Non-Microsoft Staff I don't have access to your account, nor I'm authorized to do so.
I'd like to confirm following questions with you:
- Can you delete other channels in the different team that you are the team owner?
- If you create a new test channel in this team, can you delete this test channel?
here is a workaround if you have the option “Allow members to delete and restore channels” in Manage Teams > Settings.
- Ask other team owners (or team members if the above-mentioned option is enabled for this team) to delete this channel.
- Ask your Teams, administrator, to login to the Teams admin center and go to Teams > Manage Teams> select this team and click Channels, then try to delete this channel from there.
Regards Ruth