Expand and collapse sub-tasks

Currently seeing all parent and child tasks on the same ‘level’ within all lists views (projects, days, etc.) and it would be great to be able to sort them so I can see easily which child task is related to which parent.

Example - I have two stakeholders to draft briefings for, each has a sub-task of ‘send draft for review’ but without putting it explicitly in the title (‘send Sam’s briefing draft for review’) I can’t easily tell which parent task it belongs to.

Would be awesome to have them as indented expand/collapse lists or to filter on just parent/child.