Hello PragyaSinha-c97,
Happy to help!
The behavior you're running into is a limitation of most modern browsers, which prevents audio from automatically playing unless a viewer interacts with the slide. This behavior is described in this official Google post. As a workaround, you can introduce a button on the very first slide of your course that requires learners to interact with the content to allow the audio on the second slide to play automatically. Here's an edited version of your course so you can see the workaround in action.
Hope this helps!
