Google has been overcounting mobile site experience data in its Google Search Console statistics during the past 4 months. In Google Search Console, this had an influence on both the performance evaluation and the page experience reports. The problem was persisting for the entire period from June 29 and November 1.
For almost four months, Google has been misreporting sections of this data. This was seen once again between June 29, 2021, and November 1, 2021. As such, ensure that all your customers are informed of this before you provide your following mobile site experience data.

According to Google, from November 1st, the page experience analysis and performance report will be reflecting reliable information.
Google has indeed been presenting more information in these analyses than it ought to over the previous 125 days. It would affect the reporting. Aside from that, Google did not indicate how, throughout this time, Search Console was overcounting mobile Page Experience statistics.
What Google Says
On November 1st, the information ought to be back to normal. This is what Google stated.
“June 29 – November 1: Search Console was overcounting mobile Page Experience data during this period. ” Google wrote in the information aberrations section that “On November 1, you should see a return to correct data.” This was in both the page experience report, and the performance reports sections.
Google appended a note to the comments stating that the problem was rectified on November 1st.
There was a requirement for more information. Google was yet to give further information about how this would affect reporting. What might happen to the average set of charts and data in the Search Console? How will they be affected if the percentage of excellent URLs drops for particular sites?
Thousands of Search Console attributes were searched. However, they did not detect any changes in those numbers on November 1st.
Several SEOs have become fascinated with site experience and key web vitals data during the last few years. Many SEO firms have begun marketing this as a component of their operations. They have been presenting customers with reports on the advances their websites have achieved due to such ratings.
If you send these statistics to your customers again, you should mention the problem. Google has experienced an overcounting problem for the previous four months. That is probably the reason why the figures may vary after November 1st.