You’ll find the same selection of templates on reMarkable 1 and reMarkable 2.
Templates are preset formats that can be used when writing or drawing in your notebooks. For example, you can choose the ruled template if you want to have lined paper when you’re writing, the music template if you’re writing musical notes, or the weekly schedule if you’re planning your week. Templates are only available for notebooks, and you can choose between portrait and landscape based templates.
Visit this page for more information on how to use templates.