Apple just announced Emergency Satellite SOS:

True, but it’s coming. There is also Huawei Mate 50 Pro with the same functionality.
Yes, but there is no date given. Therefore, this feature does not justify the purchase of an iPhone 14 in Europe.
@Miocheuheitz72 the lock button is the same one you use to turn the iPhone on/off. Lock button because the display is locked when you press the button.
And yes, you can try it by pressing 5 times. There are then 3 sliders: Switch off, emergency pass and emergency call
Unfortunately, this article does not mention that there are large dead spots in many hiking areas. And not only in high alpine areas but also in the Jura, for example.
Large areas in the mountains are only served by 3G, meaning switching off 3G in this case becomes a major security risk.
I recommend the REGA app. The big advantage is the tracking function, i.e. the progress is recorded by Rega and it can also be made available to third parties. If you have an accident in an area without reception, the last location with reception will still be visible when a relative is reported missing. This narrows down the search area considerably.