How to fix: The request is not allowed by the user agent or the platform in the current context, possibly because the user denied permission

It's a good thing browsers don't allow sites to autoplay audio or videos without user interaction.

However, on iOS in particular, you might encounter the error

The request is not allowed by the user agent or the platform in the current context, possibly because the user denied permission.

when there is an async operation between the user interaction and playing of audio.

The good news is there's a workaround for it.