Which of the following events is not available on Screens or Blocks?

The event that is not available on Screens or Blocks is the "After Fetch" event.

In OutSystems, Screens and Blocks have a specific set of events that can be leveraged during the application lifecycle. Among these events, "Initialize" is triggered when the screen or block is instantiated, allowing you to set up any initial data or state. The "Ready" event signifies that the screen or block is fully loaded, which enables the execution of any actions that should happen when everything is ready for user interaction. The "Render" event occurs just before the screen or block is rendered, and it is often used to manipulate data before it is displayed.

However, the "After Fetch" event is typically associated with data preparation in Aggregate or Data actions, making it less relevant in the context of Screens or Blocks where the focus is primarily on user interface components rather than directly handling data fetching. Thus, this event is not part of the typical event lifecycle available specifically for Screens or Blocks.