Drafts - iOS
On iOS, the Drafts app always displays just the Editor, which contains its own special toolbar on top and action bar above a keyboard; if you dismiss the keyboard (down caret), then another bottom toolbar appears.
There is no 3-panel window option like on macOS. Instead, the Editor toolbar integrates the same three areas with a special icon on the left to slide out the draft list, and another icon on the right to slide over the action list.