So if a family provided eggs & sperm and had a surrogate to give birth on their behalf, then later gave the child up for adoption, how would you identify everyo

So if a family provided eggs & sperm and had a surrogate to give birth on their behalf, then later gave the child up for adoption, how would you identify everyone? Also, I'd assume the child would later look for those people with their genetic material, their biological parents, those who provided the sperm & eggs. Not the birth parent, who birthed them. There's much less of a connection there as it's the person who simply carried them for a money transaction and is not part of the child genetically.