Calling it a bailout gives it a much different connotation from what's actually happening (we should always expect disingenuous reporting at this point).
It's a currency swap but calling it a bailout makes it sound like we're just giving them money, which is false (it's also been falsely reported that this is a residual of Milei's failed policies but in reality their economic struggles pre-date him and their economy has recovered a bunch since he's been in office). Additionally, my understanding is the money is coming from private sector loans, not US taxpayers.
Per Grok:
In the Argentina case you’re interested in (from the X post), the $20 billion currency swap likely means the U.S. provides dollars to Argentina’s central bank, which Argentina uses to support its peso. In return, Argentina might pay interest in pesos or dollars and agree to return the $20 billion later. The U.S. expects to profit from interest and the swap’s structure.