Have you decomposed a story into tasks/subtasks in Jira?

Yes, I have. In Jira, for ease of managing tasks and tracking progress, I often divide large user stories into smaller tasks and subtasks. This helps distribute work among the team, estimate time and resources, and monitor step-by-step completion. For example, the story "Implement authentication" can be broken down into tasks: "Create UI form", "Configure backend authentication", "Write tests", and within the task "Create UI form", create subtasks for different screens.