Well, in the coming days, the Teams PowerShell module is going to support these Teams Templates too (currently available with the preview version 1.1.11).
The support will allow you to action the following commands:
You can already start using these new commands using the Teams PowerShell module in preview (version 1.1.11) by installing the modules with the command
Install-Module -Name MicrosoftTeams –AllowPrerelease