I think that is like his 13th Kid, IF he keeps going at this rate he won't be the richest man in the world for much longer. He's gonna need a Doge just to keep track of his child support payments
Actually quite a few countries do (65) about half are unrestricted like the US others like Australia, which recently change from unrestricted to restricted, are restricted, that is at least one parent most be a citizen or legal resident.
The following countries have unrestricted birthright citizenship: Antigua and Barbuda, Argentina, Barbados, Belize, Bolivia, Brazil, Canada, Chad, Child, Costa Rica, Cuba, Dominica, Ecuador, El Salvador, Fiji, Grenada, Guatemala, Guyana, Honduras, Jamaica, Lesotho, Mexico, Nicaragua, Panama, Paraguay, Peru, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Tanzania, Trinidad and Tobago, Tuvalu, the United States, Uruguay, and Venezuela.
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.https://worldpopulationreview.com/country-rankings/countries-with-birthright-citizenship