Sequential representation of a parallel process? (skyscanner search progress)

When I search for flights on Skyscanner, it first shows a "Searching" screen with a spinner, then shows some results along with a progress bar and indicators stating "Searched 28/30 providers" and "Searching Kiwi.com" for example.

The progress bar makes it look like the process is sequential (searching one provider after the other), but I doubt that this is actually the case. Is there a UX reason why it might be represented like this, particularly displaying the name of a specific provider being searched?