so U.S. citizens who will give birth in a different country will not be granted jus soli, too?
I have no idea. It varies by country.
This is an interesting discussion on the subject.
https://cis.org/Report/Birthright-Citizenship-Children-Foreign-DiplomatsA lack of direction from Congress has resulted in children born to foreign diplomats on U.S. soil receiving U.S. birth certificates and Social Security numbers (SSNs) effectively becoming U.S. citizens despite the limiting language within the Citizenship Clause of the 14th Amendment.That's clearly wrong. A foreign diplomat exempted from US law has a birth here, and the child gets US citizenship?