US Immigration from Comoros

Hello everyone,

NOTE: If you are a US CItizen filing for a K1 or K3 Visa for your non-US fiance/spouse, and they have children, then they may bring them here under a K2/K3 Visa. The children automatically qualify fro the K2/K3 visa as derivitive status of their mom's K1/K3 status (you need only petition for your fiance/wife and list the children on that petition in the relavent blanks).

I read this note somewhere but I still didn't get it .

That is the situation for my friend. He live in USA since 2008 with a green card , he was married a woman who live in Madagascar . He has a child with her who was born in April 2015 in Madagascar . He became US citizen in June 2015. He did apply a petition to her and it was approved but the last moment they had a conflict and they divorce so he canceled the procedure of the visa. when he was back to Madagascar to visit his son and there he has other kids with another woman.but again they still not together with this one again. so now he meet the right woman to him and he would like to bring her here like fiance. so my question are:

1) HOW CAN HE DO THAT THEIR KIDS HAVE THEIR AMERICAN PAPERS?

2) DO HE NEED TO BRING THEM HERE IN AMERICA(if yes how to bring them ?) OR THEY CAN GET THEIR PAPERS IN AMERICAN EMBASSY IN MADAGASCAR?

3) HE IS GOING TO MAKE A PETITION TO HIS FIANCE - SO CAN HE PUT HIS KIDS IN THE APPLICATION? even if she is not the mother of his kids?

Just he want that the kids have their American papers. So help please.

I am US citizen and I want to make a petition to my spouse but she just told me that she played the dvlottery 2022 and like we know that the result will began from May 2021. do I need to wait until she get the result for the lottery or I can apply the petition now? And if I send the application and after we discover that she win the lottery, what to do?