Well, hello there. Correct me if I’m wrong: Apple Intelligence will be available only for US developers, and if you want to use it in your app you should immigrate to US? Because now not only usage of it’s limited for US, but every new API usage are prohibited too.
That's not totally correct.
What we read is that at initial rollout, some functions will be available in US only; but will be available later in other countries. Delay may depend on compliance issues with local regulations (Europe and China notably) or the fact that it is not yet localized.
Get details here.
PS: not sure it is a strong enough reason for emigration… 😉
Some recent news for Apple Intelligence availability in Europe (in English only):
https://www.macrumors.com/how-to/get-apple-intelligence-in-the-eu/