The only difference is adding paperwork for the kid and the sponsor has to make slightly more money per kid on the affidavit of support (I think it’s actually pretty minimal). The only thing that might throw a kink into things is if the parent doesn’t have sole physical and legal custody of the child. Then they permission from the other parent. For example I needed a signed notarized letter from my ex stating he gave me permission to take him and he was willing to do it so it was simple for me but maybe other people have more complicated custody situations. But as for the forms and money qualifications I had to do the same thing when I brought my kid with me to Sweden when I moved.
Dead 💀