What do you mean “revoked”? Liebich’s german Wikipedia page does not say anything like it. It says Amtsgericht Halle applied to change it back and that Liebich herself applied to change to first name “Anne Frank” and gender “diverse”. Both proceedings seem to be open still?

Also, she did not change her sex, just her gender, did she?

For the US, only the state is debtor for the last years, while households, businesses, and foreigners are creditors.

The key word to search for “sectoral balances”. I could not quickly find any good and recent data for the EU or China though. For Germany, state and foreigners are debtors, but that is probably not true for the whole EU.