WordPress audio autoplay not working

I am using the plugin WP Maintenance Mode to load a under maintenance website on a website.

I would like for audio to play as soon as somebody lands on the website and for audio player to remain invisible.

BACK SOON

[audio src="//myWebsite/wp-content/uploads/2021/03/audio.mp3"]

This will load the page and show the audio player and it will play when I press play

I have tried

[audio src="//myWebsite/wp-content/uploads/2021/03/audio.mp3 width = "0" height = "0" autoplay=1]

to try and get it to play automatically and without the audio player, but no success.