For me also highly requested.

For me as well.

Or maybe add a parent task field that lets you choose the parent task, or a button that would remove it as a child task and place it on the top level of that list.

same here, would really appreciate this feature even in a very simple way (eg choose task in dropdown, send task to other task)

Me too! It is a big part of my workflow that I can't complete on my mobile.

Ditto

Yes, appreciate to have this