But I don’t see any reason why they “wouldn’t be able” to have a deal anymore.

It's this part of the article that stuck out to me:

the DOJ suggested limiting or prohibiting default agreements and “other revenue-sharing arrangements related to search and search-related products.” That would include Google’s search position agreements with Apple’s iPhone and Samsung devices — deals that cost the company billions of dollars a year in payouts. The agency suggested one way to do this is requiring a “choice screen,” which could allow users to pick from other search engines.