I visited https://www.bbc.com/news/world-asia-54702974 https://www.bbc.com/news/world-asia-54702974 to confirm the lighthouse scores in their article, but the P

I visited https://www.bbc.com/news/world-asia-54702974 https://www.bbc.com/news/world-asia-54702974 to confirm the lighthouse scores in their article, but the Performance consistently scored ~30 instead. Why is there such a large gap between what I'm seeing and what they're seeing?