How do I book Air New Zealand Skycouch, and why might my preferred configuration be missing?

What this answer depends on

• Air New Zealand Economy Skycouch booking/configuration process on flights where offered; adult operational guidance only
• A Skycouch add-on is not the whole cost of the journey. Air New Zealand describes the configuration after flight selection, with traveler fares plus the additional product amount. Compare the complete total and named arrangement before payment; do not multiply a promotional example as though every booking used the same price.
• Skycouch is a named Economy product using a seat row with raisable leg rests, not permission to occupy any unselected row. Its booking process differs from Lufthansa’s airport-only Sleeper’s Row inquiry. Use the product actually offered for the flight, rather than assuming a seat-map gap can be converted into the same arrangement.
• The airline invites travelers to ask about arrangements not shown online. That is a clarification route, not an inventory guarantee. Explain the intended configuration and check the resulting full quote, rather than booking an unrelated arrangement on the assumption it can later be changed.
• Air New Zealand offers Economy Skycouch as a seat-row product with raisable leg rests, configured through Seat Select on applicable flights.
• The Skycouch booking total combines traveler fares and the Skycouch add-on for the selected configuration.
• Air New Zealand directs travelers to contact it when the desired Skycouch configuration is not shown online.