The Draw tab is not on Excel's ribbon by default. Learn how to enable, add and use the Draw tab and the various drawing tools in Excel.

If Developer tab in Microsoft Office is missing, you can add Developer tab in Word, Excel, etc. via Settings, Group Policy, Registry Editor.

The best way to do it, I think, is to describe how to use it in its latest iteration: Tap and hold space bar for precise text selection. This works on any Apple gadget running iOS 12.