Earlier quoted context omitted.
You're not understanding this. A company can create a new search engine and Google Search isn't obligated to even mention it. The issue is when achieving market dominance and new service is integrated into the dominant product. You clearly haven't been around long enough to have caught a lot of discussions on this topic over a decade ago.
But is searching for products a new product line, or just a natural extension of searching for webpages (many of which are about products)? Where do you draw the line between merely improving the monopoly product and abusing the monopoly?
But for example if they're behind a user choice like a click after your search is done, ie click shopping or maps because you want to use googles products in this case, then its likely not over the line. If its still over the line would they be required to unbundle products by for example using different domains? Would that also apply to things like facebook marketplace then?