Divorce and child custody agreements are two separate legal things and child custody agreements are thankfully not a matter of public record.
And yet I was able to pull my parents Divorce from decades ago and in those documents were details about who has rights to me… I think this is likely a state by state thing. Though my name was never directly mentioned.
You can only seed to people who have ports open. At least one side of the connection needs to be reachable.
It’s people like me who keep ports available that are able to seed to you.