Here's my webpage. The iframe (YouTube) element can be played just fine, but the audio element doesn't play sound on my iPhone.

It's very simple and short code in HTML and JavaScript. I know it's not very well written given my lack of experience, but I wonder why it works on my MacBook's Chrome but not on my iPhone's Chrome or Safari. Can anyone please give me a hint?

https://averytaiwan.neocities.org/001_most_amazing_revenge.html