I’m not a source (and this is not about France) but I remember when Juan Guido declared himself president of Venezuela, the Bank of England just kept a load of Venezuelan gold and wouldn’t let Maduro’s government do anything with it

There you go:

• https://www.reuters.com/article/us-venezuela-politics-assets/us-gives-guaido-control-over-some-venezuelan-assets-idUSKCN1PN1MJ/

• https://www.declassifieduk.org/why-is-venezuelas-gold-still-frozen-in-the-bank-of-england/