Daylite for iPhone and iPad lets you add tasks to the worklist in two ways:
Adding during the task's creation or editing
When you set up a task or edit a task, simply tap Add to Worklist to have it added to your worklist immediately.
Adding existing tasks
When you're viewing an existing task, just tap the thumb tack icon like on Daylite for macOS and it will be automatically added to the worklist.
Learn how to manage and prioritize tasks in Daylite in this article:
How do I manage and prioritize tasks in Daylite?