iPhone Ultra: Vapor chamber cooling for Apple's first foldable phone?

According to Chinese leaker Fixed Focus Digital, speaking on the Weibo network, the iPhone Ultra, Apple's first foldable smartphone, will feature an impressive cooling system: a vapor chamber (or heat pipe), a feature recently introduced on the iPhone 17 Pro. An unexpected innovation for an ultra-thin chassis. This information should be taken with caution, however, as the device is already in production, and such a component has never before been mentioned in the numerous and specific rumors surrounding the iPhone Ultra. It's also worth noting that the iPhone Air, which is similar in thickness to the iPhone Ultra, does not have a heat pipe. Is the launch still on track for September 2026? The leaker adds that despite numerous production difficulties, the device is still on track to meet the release schedule, namely a September 2026 launch.