If i use ion-reorder on the list populated inside ion-modal then, while dragging and dropping of list item there is defect in its effect of drag-drop.
Try to reorder ion-list in this codepen link:
I just wrapped all content inside div with class “modal” which is used by ionic to open template inside modal box.
Defect : When i start dragging any list item, shadow of item is already few items below. Which i believe is same to distance between top of the page and start point of modal box.