Do heterodox have a guardian angel as well? (Eastern Orthodox perspective)

According to the Eastern Orthodox Church, do non-Eastern Orthodox have guardian angels as well? By guardian angel, I mean a righteous spirit assigned to a person by God in order to guide and protect them throughout their life for the purpose of their sanctification. I know that all Orthodox have them, and I believe they are assigned at Baptism, so it would make sense that *non*-Orthodox would not have one *but I am unable to find a clear answer.* Bonus points if you can answer regarding confessions that are not in communion with the Eastern Orthodox but whose Baptism is recognized as valid by them, e.g. Roman Catholics, some Presbyterians, etc.