May 28, 2020 Google has introduced a new algorithm for calculating the rating of a store to display it in the top of the search results. AMP is now optional.
The key value that influences the rating of the store is the speed of displaying the largest block of the visible part of the screen - LCP.
Google has created an excellent tool for calculating and analyzing ranking problems - Measure .
You can use the calculator to check the impact on the rating Lighthouse Scoring Calculator .
In the example below, you can see what the store's rating will be if all indicators are set to maximum speed, and the LCP indicator is 4.7 seconds.