Dear Martin Reid2
Good day!
Thank you for posting to Microsoft Community. We are glad to assist!
Based on your description, I understand you concern with creating a Teams channel.
If you are creating a Teams channel, it will automatically create a SharePoint site.
A SharePoint site is a web site in SharePoint where you can create web pages and store and collaborate on files. SharePoint sites can be used independently and are also used by Teams for file storage (called Teams-connected sites). A Teams-connected site is created automatically whenever you create a team.
The SharePoint site that is created when you create a private or shared channel in a team. Only owners and members of the private or shared channel have access to this site.
For more information about Teams channel and SharePoint site, you can refer to Teams and SharePoint integration - SharePoint in Microsoft 365 | Microsoft Learn
Create a standard, private, or shared channel in Microsoft Teams - Microsoft Support.
Thanks for your precious time and your understanding would be highly appreciated. Have a nice day!
Best regards,
Allen | Community Moderator