Hi. My sister is a permanent resident currently in the Philippines. She recently gave birth, and her child is now 1 year old. She is planning to return to the United States this month with her child. Her itinerary includes a connecting flight from MNL to TPE, then TPE to the U.S. Do you think there will be any issues with immigration in the Philippines? We've read a lot online, and it seems there shouldn't be any problems in the United States, but we're concerned that Philippine immigration might not allow her to travel with the child.
https://www.cbp.gov/document/guides/carrier-information-guide
Exceptions
Child born abroad to lawful permanent resident may be boarded if the child was born during the temporary visit abroad of a mother who is a lawful permanent resident alien, or a national, of the United States. However, the child’s application for admission to the United States must be made within two years of birth and the child is accompanied by the parent who is applying for readmission as a permanent resident upon the first return of the parent to the United States after the birth of the child.