If you want to automate Microsoft Teams Channels using Power Automate Flows, you can use a simple action named ‘Create a channel’ from the Teams Connector in your Flows (still in preview at the time of writing this post). 
But due to naming restrictions, if you use unsupported characters (~#%&*{}+/:<>?|’”..) in the channel name, you will get errors related to that and the channel is not…
Continue Reading Michel Mendes’s Article on their blog
Creating Teams channels in a Power Automate Flow: How to avoid unsupported characters errors – michelcarlo
Automating Teams channels creation from SharePoint list data using Power Automate and manipulating the channel name before creating it to avoid issues.
Blog Syndicated with Michel Mendes’s Permission