Chapter 15 governs the provision of relief under US bankruptcy law to non-US companies and individuals in foreign insolvency proceedings that seek to protect their US-located assets from enforcement proceedings or direct appropriation by individual creditors.
So Kyle Davies and Su Zhu likely have most of their personal assets domiciled in the United States?
They're both American. Su Zhu looked to have a nice apartment in Singapore based on his now notorious UpOnly episode. It seems 3AC is kaput now, and the two will be reduced to whatever money they invested outside of the company, which for all we know is a fantastic amount of real estate, equities and cash.