Eh guys, I don't know jack-squat 'bout Economy & how budget works, but...the article states:
" ... the draft budget for fiscal year 2022 was presented to the National Congress, which includes a request of US$ 664 million for the acquisition of JF-17 Thunder Block III fighters. "
So naturally it isn't set in stone. Backlash from the US, UK and/or Europe might come at a later stage, but it seems the first hurdle is the National Congress of Argentina whom have to approve the purchase - first.
Not sure - so anyone is welcome to correct my assessment.