Once the deal is restored the United States will lift oil export sanctions imposed by former President Donald Trump when he withdrew from the JCPOA in 2018. It will also remove international banking restrictions also imposed as part of Trump’s ‘maximum pressure’ on Tehran.
But what Iranian media presents as ‘Europe’s freezing winter” has almost nothing to do with Tehran’s crude oil exports, except generally helping to bring down oil prices. Europe’s need to replace Russian gas is a specific issue on its own that Iran cannot help with at all.