” Open a multi-page Lighthouse sample on a real storefront and the story often flips: mobile Performance scores cluster near 50, lab LCP averages stretch well past Google's 2. Theme-level CrUX aggregates describe shops that look like a given theme under field conditions. Portfolio monitoring needs URL-level and multi-page evidence, because apps, media, and collection templates decide what shoppers feel. What follows separates those clocks, publishes a reproducible sample from Shopify leads we analyse in Apogee Watcher, and points at the tuning work that actually moves scores. For store-level fixes after you read the numbers, pair this with Shopify Speed Optimization: Core Web Vitals Guide for E-Commerce .