Viewing all tasks for parent project and sub projects

Currently i can only view tasks for sub projects by clicking on each one, is there a way to show all tasks from sub projects just by clicking on the parent project?

Create project “test parent project”
Create task “test parent project task”
Create new project “test parent project sub project” with parent of “test parent project”
Create task “test parent project sub project task”
View kanban of “test parent project”

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In backlog i only see “test parent project task” and not the task of the sub project.