When I click the edit button in iOS/iPad, I want the keyboard to open immediately.
Currently I have to click the edit button and then click somewhere on the screen to open the keyboard. Also, when I click somewhere on the screen, I lose the cursor location.
Alternatively a single tap to edit (similar to iOS Notes).
Given people may have different preferences, perhaps an option of the 3(?) approaches: standard button-to-edit, open-in-edit, tap-to-edit.
I'm not sure how beta it is, but I switched to the editor beta on mobile. It removes the edit button and shows the rendered view and edit view at the same time, and you can tap the editable text to bring up the keyboard.