This is a nice tutorial that shows how to create Gutenberg block templates using PHP.

Here is a walk-through of the new Ollie Block theme setup wizard. Jamie Marsland says it simplifies the setup and makes it easier to understand. Do you agree?

For Block Theme Developers – Block themes come with two template part areas: header and footer. This tutorial by Justin Tadlock tells how to create additional template part areas for your theme, like a sidebar.

Yikes! – Note that WordPress 6.2.1 removes support for shortcodes in block theme templates. Apparently this was part of one of the security fixes. There are a couple of work-arounds mentioned in the thread.

The most popular block themes – This video looks at the differences between classic and block themes, at the top 20 block themes by the number of active installs, and at some of the reasons these themes are the most popular ones.