Karolina Szczur Why Lighthouse Performance Score Doesn’t Work
https:/
There is some correlation between the [Lighthouse] Performance Score and how well your site will do for real users. Still, lab testing alone doesn’t capture all speed issues (similarly, field testing might prove inadequate in showcasing other speed problems). That’s why relying on Performance Score is not a bulletproof strategy. We recommend measuring both in the lab and field with a selection of metrics (including but not exclusive to Core Web Vitals).
Zach Leatherman