On mobile QuickView, there should be arrows that allow the user to navigate to QuickView for the previous and next article result without going back to search results.

Link to Mobile specs in Figma

Note: this was originally part of T306885, but we broke it out since as per @SimoneThisDot:

The UI currently does not have a list of result... so we need to expose it for the UI to be able to know what is the next item to show. The results list that is currently rendered when you search something, is delivered in the UI in the form of HTML. To be able to define a navigation (prev/next) the UI need to actually receive an object with a list of results, so that it is able to define which one if the next one to show. We could do all using JS and walking thought the HTML, but it would be extremely fragile and doing this extra work to expose this list of result from the new extension is the best approach.