De-asynchronize does not work...

gistfile1.txt

$ cat read3.mjs
import csv from "fast-csv";

let expected = [
    ['Col1','Col2','Col3'],
    ['1.1','1.2','1.3'],
    ['2.1','2.2','2.3'],
];
let input = `Col1,Col2,Col3
1.1,1.2,1.3
2.1,2.2,2.3
`;

const doasync = async _ => {
    let rows = [];
    await csv.parseString(input,{ headers: false })
    .on("data", row => rows.push(row) )
    .on("end", rowcount => { console.log(`# rows= ${rowcount}`) } )
    return rows;
}

let rows = doasync().then(ar => {console.log("then:",ar)});
console.log("rows=",rows);
$ alias nx
alias nx='node --experimental-modules'
$ nx read3.mjs
(node:7896) ExperimentalWarning: The ESM module loader is experimental.
rows= Promise { <pending> }
then: []
# rows= 3
$