Looks similar to me. Are from modified ecommerce via relaunch now at shopware 5.6 and try to reach my old ranking again. Download time of 300ms on average now at 600ms. And it also has an impact that Google has now significantly reduced its myfedloan crawling budget.
Just try to turn all possible set screws to get the best out of shopware. webp, caching, gz, lazyloading, …
If someone is interested in sharing experiences. With pleasure!
Only the Google Crawler has big problems with the large amounts of JavaScript and reduces our crawl budget by a whopping 90% and more. I am also happy to test the tip with HTML compression. But will probably not change anything in the present problem!