If nothing was unclear or difficult, say so. Skip questions about steps you did not experience; use not applicable where appropriate.

Which item detail was difficult to change?
How did you confirm the new quantity?
What update explanation was missing?

Author notes / illustrative keys where applicable:
1. A hard-to-change item detail identifies the cart control that obstructed the intended edit. Preserve the option context without assuming the cart confirms final availability.
2. The confirmation cue reveals whether shoppers can verify an intended quantity change before continuing. Explain actual updated state and relevant checks, without assuming a visible cart update establishes final stock or purchase confirmation.
3. A missing update explanation identifies what shoppers need to verify after editing. Describe the actual cart state without implying an order or stock reservation is confirmed.