On the product page where Apple mentions "Emergency SOS via satellite", there's a little "4" referring to a footnote.
That footnote reads:
"Service is included for free for two years with the activation of any iPhone 14 or later model. Connection and response times vary based on location, site conditions, and other factors. Messages via satellite requires a carrier plan. SMS messaging via satellite is available on supported carriers. SMS message rates may apply. See support.apple.com/kb/HT213885 for more information."
If you follow that link, it redirects to Connect to a satellite with your iPhone - Apple Support, where the "Satellite features on iPhone" section says "Availability of Apple satellite features depends on your country or region."
Apparently the features are not available in your country or region.