The radiant young soprano returned to the Metropolitan Opera to star as the Marschallin in a revival of Strauss’s “Der Rosenkavalier.”When the luminous soprano Lise Davidsen released her first solo album several years ago, she faced criticism over her repertoire.Chiefly, that while she was just in her early 30s she had chosen to record Strauss’s autumnal “Four Last Songs.” In an interview then, her characteristic geniality gave way to exasperation. “It pisses me off a little bit that you have to be a certain age to feel certain feelings,” she said. “Teenagers have all those feelings, and more, in a day.”With more measured calm, she added: “But I do believe that I’m entitled to take on those feelings, to take on the difficulties in life. That’s our job in opera.”She challenged doubters again on Monday when Strauss’s “Der Rosenkavalier” returned to the Metropolitan Opera with Davidsen, 36, making her role debut as the Marschallin — a character more typically portrayed by seasoned grandes dames. So much so that this production, by Robert Carsen, opened in 2017 as a vehicle for Renée Fleming’s farewell to the role.Never mind that in the libretto, the Marschallin is in her early 30s. Or that Fleming was around Davidsen’s age when she first sang the part at Houston Grand Opera. But as Davidsen said of the “Four Last Songs,” a performer has every right to a role if she can persuasively “take on those feelings,” not to mention the notes. And Davidsen can, on both fronts.Davidsen excels in repertoire — mostly Wagner and Strauss — somewhere between the achingly human and the otherworldly: the saintly Elisabeth in “Tannhäuser,” the mythical title character in “Ariadne auf Naxos,” the forlorn Sieglinde in “Die Walküre.” The Marschallin, however, is entirely earthbound. In conflict with neither God nor the gods, she is simply staring down middle age and the inevitability of change.That said, the Marschallin is a woman of stature: influential, composed and well connected. Davidsen captures this naturally, exuding confidence more than wisdom, and behaving with discretion in public while reserving playfulness for the intimacy of her bedroom.When we meet the Marschallin, she has just spent the night with her 17-year-old lover, Octavian; over the course of the first act, her amorous bliss gives way to solemnity as she explains that their affair has an expiration date — “today or tomorrow, or the day after next.” When Fleming sang that line, it was with the authority of experience. But where her Marschallin looked back, Davidsen’s seems to look forward; she’s keeping it together while aware of the anxiety that sets in whenever she looks in the mirror.Throughout, Davidsen alternates between conversational restraint — enunciating each syllable of Hugo von Hofmannsthal’s talky libretto with penetrating focus — and white-hot radiance. Her terms of endearment for Octavian emerge like a rising sun. And in the final trio, her sustained high A on the word “glücklich” (“happy”) soars and crescendos to a glowing benediction for her lover’s new life with Sophie.“Der Rosenkavalier” is an ensemble opera in which it can be difficult to call anyone a protagonist, but Davidsen’s Marschallin leaves the stage the most evolved. Among the lines that landed freshly on Monday was her last. With Sophie’s father, Faninal, she passes by the happy new couple. He sings, “Young people are always the same”; and she responds, “Yes, yes,” with a D sharp falling nearly an octave below to an E, as if sighing.On Monday, that moment was a reminder that while the opera often seems like the story of two generations, it is more like a tale of three: Octavian’s, the Marschallin’s and Faninal’s. With that “yes, yes,” Davidsen’s Marschallin suddenly matures, shedding the anxiety of wrinkles and lovers lost to enter the next phase of her life.Also remarkable on Monday was the mezzo-soprano Samantha Hankey, singing the role of Octavian at the Met for the first time. She made even bigger the mighty yet smooth sound, as well as the tireless energy and dramatic skill, that she brought to her performances last year in a “Rosenkavalier” at the Bavarian State Opera in Munich. With a cherubic face she looked every bit the part of a young lover, and, with a touch of careless manspreading while lighting a cigarette, very much a boy.The baritone Brian Mulligan made a role debut, as well, as Faninal, with commanding ease and entertaining comedic instinct. And veterans of the production returned: the soprano Erin Morley, still a bright, elegant presence as Sophie; and the bass Günther Groissböck, still a dangerously handsome Baron Ochs, though more strained in this revival, his gravely low notes and declamatory articulation characterful but not always assured.Under Simone Young’s baton, the Met Orchestra improved as the evening progressed. The opening, a kind of pornography in music, was romantic where it should have been ecstatic, and a Mozartean interlude in the first act wasn’t scaled back to match the style; the dreamily glinting rose motif was more legato than lustrous. But Young effectively conjured the romping chaos of Ochs’s cohort in the second act, along with his famous waltz and the darker, “Salome”-like dancing rhythms of the third act.Carsen’s production remains the textbook-perfect staging of modern Met history: elegant and satisfyingly grand, smart but not daring. His major intervention — moving the opera’s setting from the 18th century to the year in which it premiered, 1911, from the cusp of revolutionary Europe to the brink of World War I — also remains eerily evocative.The Marschallin’s bedroom is covered in large canvases: portraits of great men, scenes from battle and court. It seems as though the walls can barely support the weight of history. In the first act, her life is saturated at a tipping point of decadence; a parade of visitors and excess — needy orphans, salespeople with the latest fashions, an attention-hungry tenor — overwhelm her, the score and the stage. By the end, the set opens up around Octavian and Sophie as they rejoice in their future together, revealing a line of soldiers charging into battle, and stumbling as they die.When the production opened in 2017, its depiction of a society blissfully unaware of the transformation ahead recalled the recent, surprise election of President Donald J. Trump. Since then, it has been redolent of much else in our time of too-muchness: the pandemic, the war in Ukraine, climate disaster.If Carsen’s “Rosenkavalier” has staying power, it is because of this chameleonic resonance. As the Marschallin well knows, the only constant, in a forward-spinning world, is change.Der RosenkavalierThrough April 20 at the Metropolitan Opera, Manhattan; metopera.org. More