It’s linked on the page you described navigating too…
https://www.home-assistant.io/docs/blueprint/schema/
That was unnecessary, If/Then actions work in Blueprints.
There is no difference in the YAML used for a Delay action in an automation and one used in an automation blueprint.
One doesn’t if they are using the UI editors… https://community.home-assistant.io/t/wth-comments-disappear-from-yaml-editor/802437/6