The freedom to not be kicked out of your home and sent to a foreign land because of who your parents happened to be is as much a right or construct as the right to speech, belief, or any other codified right.
Hence why if that’s not a right, then there are really none of significance.

Rights are not bestowed by governments, international declarations, or treaties.

Arguing that a sovereign nations laws contradicting something makes it not a human right is a powerfully slippery slope.

The rights of people matter more than those of nations.