Team Templates in Teams:

If you haven't noticed, there are configurable Teams templates available for your tenants. With this feature, there are 10+ (13) prepared templates for every organization. But the admin center allows for customizations of existing templates and creation of your own templates.

In the Teams Admin center, expand the "Teams" menu to access the "Team templates". Edit the existing templates, or create a new template from scratch or based upon an existing template or an existing Team.

The template admin will let you pre-create channels and their shown or hidden status. As well as adding apps and tabs to the team and associate them with the desired channels.

This feature is going to simplify standardization and creation of functional teams throughout the organization.

According to the roadmap, the feature is being rolled out this month.  And you can read all about how to work with these templates in the documentation library.