It's hard to keep track of all the nuance from the outside. Did internal prices in Argentina not undergo a similar change? If not, then it was just a nominal devaluation.

I recall reading about Argentina's strict capital controls to make sure people weren't swapping their pesos for dollars.

Undisciplined

Politics_And_Law

Nine Months of Javier Milei as President of Argentina: A Critical Assessment

"the negative side [...] Devaluation to 975 pesos from 322 to the dollar when he took office"

???

Devaluation? The previous government had fixed the exchange rate manually to an incredibly artificial low rate? Why do they keep calling it devaluation? He brought it closer to the real, market value.