Given how episode 7 is titled "Left Behind" - the same title as the DLC which told Ellie and Riley's story - it is clear that episode will feature Storm Reid as Riley.

Source: https://screenrant.com/where-did-the-fireflies-go-last-us-episode-6/

However, for some of us, 2014’s DLC chapter, The Last of Us: Left Behind, proved to be even more remarkable.

Source: https://kotaku.com/last-of-us-tlou-s1e7-left-behind-ellie-riley-hbo-mall-1850161819

Remember to keep your devices and updated to ensure compatibility with Notify When Left Behind.

Source: https://www.devicemag.com/notify-when-left-behind/

Sarah Posner, author of How White Christian Nationalists Powered the Trump Presidency, and the Devastating Legacy They Left Behind!

Source: https://www.greenleft.org.au/content/strange-allies-white-christian-zionism-and-antisemitism

She lamented efforts at reform like school closings, No Child Left Behind and other government programs “that particularly harmed Black students.”

Source: https://chicago.suntimes.com/education/2023/9/28/23895265/black-community-leaders-call-on-cps-to-fix-achievement-gap

The video prominently features real-life demonstrations of essential security functionalities like "Notify When Left Behind" and "Find My," along with the convenience of "Family Sharing."

Source: https://www.ibtimes.co.in/lost-your-mac-apple-flexes-security-prowess-action-packed-short-film-teaches-valuable-lesson-860916

What's Left Behind is one of the Forgotten Memories quests that adds the climax to the story, by revealing how The Forgotten brought havoc to the valley.

Source: https://gamerant.com/disney-dreamlight-valley-whats-left-behind-quest-walkthrough-guide/

While HBO's has altered its source material and expanded on its post-apocalyptic world, "Left Behind" provides a fairly faithful adaptation of the game expansion from which it derives its title.

Source: https://www.cbr.com/hbo-the-last-of-us-expands-ellie-riley-backstory/