I know how to use promise in qml.
However, obviously awaiting is more convenient.
According to https://bugreports.qt.io/browse/QTBUG-58620.
They said will add support about async/await in Qt 6.6.

so how can i use it ? The support is really?

Hope to use it like this:

function getSomething() {
    return "something";
}

async function testAsync() {
    return Promise.resolve("hello async");
}

async function test() {
    const v1 = await getSomething();
    const v2 = await testAsync();
    console.log(v1, v2);
}