It depends if anything else was earned while she lived in New York whether she would need to file a Part-Year Resident return for New York in 2019. She will definitely need to file New York in 2020 since she is a resident.
Please see the 2019 New York IT-203 Part Year and Nonresident Instructions, page 7 for How are nonresidents and part-year residents taxed? and Who must file?
2019 New York IT-201-I Resident Instructions for your reference in 2020
