Page loading speed indicators in the Shopify partners panel

[dmitry_try]

Good afternoon. I am optimizing the rendering metrics of my application. At the moment, the following problem arises:
On the local server, the lighthouse indicators are fine, but as soon as the assembly gets into prod, the LCP and CLS metrics increase significantly. At the same time, the statistics in the Shopify partner panel are even worse. Could you give me a hint how the performance of my application are measured by shopify? Could you tell me how to optimize the application even more? what exactly should i do to pass the LCP and CLS checks