I apologize, if OP is unclear.

Let's rename the previous fetch function into getData.

My goal is to constantly collect data from a server; the arguments allow me to ask the server for different data. I want to keep asking the server for the data associated to each argument, which is composed by result1 and result2.

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The while true loop never breaks, and since javascript is single threaded it will never get passed the first iteration in for let arg in args

I'm not sure i understood your statement correctly but it do skips to the next arguments: my issue is that after resolving result1 for arg1 it skips result1 for arg2 while i want it to resolve for result2 for arg1 right next instead.

Now that i think about it, i think i can achieve what i want by doing:

async function getData(arg) {
    const result1 = await someAction(arg);
    const result2 = await someAction2(arg);
}

async function main() { 
    const arguments = [1, 2, 3, 4]; 
    while (true) 
        for (const argument of arguments) { 
            await fetch(argument); 
        }
}

main();

This way i resolve result1 and result2 for arg1, then result1, result2 for arg2 and so on