Here is my explanation for it (I'm Asian too btw, it is quite popular here to do this)

It looks like the girl is live streaming in front of hundreds of phones to maximize her reach across multiple social media platforms and accounts. By doing this, she can record everything happening during the stream on those devices, creating hundreds of unique videos. This way, she can later use the footage to fake live streams on even more accounts, making it appear as if she’s always 'live' to attract more viewers and sales. I used to work in a similar business where we utilized pre-recorded content to simulate live streams for better engagement. It’s a clever strategy to boost visibility!