John Mueller explained in his hangout on 08/13/2021, that the page experience update is unrelated to the core updates. While Core Web Vitals and the core updates have similar wording, they are not the same. Instead, the Page Experience Update focuses on speed, and the core updates focus on your overall website quality.
One webmaster’s problem stemmed from being unable to validate page speed issues and corroborate information within Google Search Console.
John explained that in Google Search Console, what they show is field data or data from real-world users. Tools like Google Page Speed Insights are lab tests or lab data, which are different from data that you would find in Google Search Console.
If you make a change now, it will take close to a month to show up in Google Search Console.
This comes up at approximately the 00:34 mark in the video.