With the two-day Biden leaders' summit on climate attended by 40 countries, the United States has returned to the international stage of climate diplomacy. Whether the increased ambition of new climate action pledges via video made by several core countries can be implemented in a binding manner, however, remains an open question - not only, but also including in the United States. An urgently needed signal that the Biden administration is prepared to take on a leadership role in international climate finance in the run-up to COP 26, however, was missing in action.