Iran is also playing its own Uno card here by saying that it would consider allowing some oil and gas shipments through the Strait if they have been bought with Chinese Yuan, than the US dollar. ( The Islamic Republic may grant safe passage to oil tankers if the cargo is traded in Chinese yuan - https://www.lbc.co.uk/article/iran-allow-chinese-ships-hormu... ).
This is particularly funny if you consider petrodollar to be a bad deal for US, not a good one. Ironically, if yuan becomes new petroleum currency, it might hurt Chinese long term.
I've never heard the expression "to play one's Uno card." Is this a play on "to play one's Trump card"? I can understand why this phrasing could cause confusion, but want to make sure I'm not missing something.