There is a slight change in how Core Web Vitals are measured and reported on in Search Console. Google recently announced in their blog
Google Search Console is changing how Core Web Vitals are measured and reported on, which is likely to be a positive thing for site owners.
Going forward, the metrics defining the boundaries for largest contentful paint (LCP), first input delay (FID), and cumulative layout shift (CLS) are now defined as <= (less than or equal to).
Previously the boundaries for each of the Core Web Vitals was defined as < (less than).
That meant the Google Search Console report would only show a “good” rating if measurements were under the ideal thresholds.
Site owners can now achieve a “good” rating if measurements meet the ideal thresholds.
For example, an ideal measurement for LCP was previously defined as less than 2.5 seconds. If LCP was recorded at exactly 2.5 seconds then the site owner would see a “needs improvement” rating in Search Console.
That is no longer the case. Now that same site will receive a “good” rating.
The rollout of Core Web Vitals as a ranking factor is still months away, but it’s never to early to start preparing.
Source: Google Search Console