Hello Zerotsj
Good day to you and thanks for your post in Microsoft community. Hope this finds you well.
I am writing to sincerely apologize for the inconvenience you have experienced due to Unable to Create a "General" Channel from Scratch in Teams Desktop
Upon investigating the matter from our end, and it appears that you’ve encountered a common issue in Microsoft Teams. The “General” channel is indeed reserved and automatically created when a new team is set up. the General channel no longer automatically created when creating a Team from scratch(a basic team)**,**seems currently to get this General channel created, you need to use the More create team optionsand choose the "From another team" or "From a template" and use the "Manage a Project" for example.


you can check this thread also: New Team doesn't have a General Channel - Microsoft Community
This behavior will be reported to Microsoft for confirmation, and we will monitor it. We will provide you with an update as soon as we receive it.
If there is anything we can do to assist you or if you have any further concerns, please do not hesitate to reach out to us. Your satisfaction is our top priority, and we are here to support you in any way we can.
Your kind understanding is greatly appreciated.
Sincerely,
Shajia Afrin | Community Moderator