Sub task estimation view

[Anush Chatikyan]

Who can help me?

Why it's not shown the estimation of Sub tasks here ? 

[__ Jimi Wikman]

You will find that subtasks rarely display estimates, and the reason for that is that subtasks are designed to be checklists rather than work orders as Stories/Tasks are. It is not how many uses them, but that is the reason you don't see them in the scrum board or in the stories themselves.

In your example, I would have suggested that your story is too high up and each of the tree subtasks are actually the work orders and the story just work as a container, which is what epics are for.