Timeline View - Phases?

Hi,

I see this image in the following link: https://support.microsoft.com/en-us/office/advanced-capabilities-with-premium-plans-in-planner-6cdba2aa-da06-4e08-be4c-baaa4fda17ba#bkmk_advanced_dependencies

How do I achieve the phases shown here e.g. Production?

Note - I am currently on Planner 3 trial.