Although there are a few basic blocks available after creating a project, there are a lot more blocks available in the dev kit. However, you have to add them to your project using WP-CLI (the simplest method). To see the complete list of available components and blocks, visit our Storybook.
These can be used out-of-the-box, but also as a good starting point if you need similar blocks in your projects. It will also speed up your development time since you don't have to build everything from scratch.