How to install templates from nuget package?

I know I can install nuget packages from templates:

https://docs.microsoft.com/en-us/nuget/visual-studio-extensibility/visual-studio-templates

But I'd like to do the opposite, I'd like to install templates - provided by the nuget package - after the package was installed.

I read I could create a powershell script and run that after the package's been installed. Is that the only way? What are my options here?

Thanks.