Block category: Common
The Common category includes the following blocks: Paragraph, image, headings, list, gallery, quote, audio,
Block category: Embeds
This post tests various embed blocks:
Block category: Widgets
The shortcode widget: The Archive Widget: The same Archive widget but as a dropdown:
Block category: Layout Elements
The Layout Elements category includes the following blocks: Group, Button, Columns, Media & Text,
Block category: Formatting
The formatting category includes the following blocks: The classic block can have almost anything