I have seen Why can't JavaScript .play() audio files on iPhone safari? and I know that a user interaction is required before playing an audio object. However, this doesn't work on iOS 14:

<div id="a">Click here</div>
<script>
var audio = new Audio('a.mp3');
audio.load();
document.getElementById('a').onclick = function() { 
    audio.pause();         // always restart the sound, see https://stackoverflow.com/a/13243338
    audio.currentTime = 0; 
    audio.play(); 
}
</script>

With this code, no sound is produced which clicking/touching on the <div>, with an iPhone on iOS 14.

How to solve this?