Though, to Max Barbakow’s credit, he does provide a callback to Palm Springs dialogue that could rule that possibility out. When talking to Andy Samberg’s Nyles, Nana Schlieffen does say that she’s been to a lot of weddings, which could either be used as a proving or disproving statement towards Nana’s time loop presence. However, later in the film, when Nana’s talking to Sarah on her last go-round after decades of attending the same wedding, she does say, “I suppose you’ll be going soon.” Which brings us back to square one, assuming that Nana might be more knowledgeable about the scenario than we think.
Article source: https://www.cinemablend.com/news/2551208/hulus-palm-springs-are-there-more-characters-in-the-time-loop