Debt for governments doesn’t really work like debt for people. The vast majority of it is owed either to the US government, or individuals/companies in the US.

It’s generally treated like a low-yield extremely safe investment. You can absolutely count on a US government bond being paid on time, every time. If the US starts defaulting on debts like that, it’s a safe assumption that the entire economy has gone to shit a long time ago. Which means it’s good for everyone.