Just me: After the beis din adjudicates all the divorce issues, including asset separation and custody al pi halacha, it can be legally filed uncontested by both parties accepted based upon the Beis Din’s decision, based on Jewish law. There is no excuse to have it decided based on secular law in contravention with halacha (an extremely severe violation of halacha).
Also, in most cases in fact where this occurs (which is actually a very small number of get cases), there is in fact a legitimate reason for its withholding.