Sydney Sweeney is ready for her close-up. The “Euphoria” alum, 28, stripped down to lace and fur for the latest campaign for Syrn, her lingerie brand, shared to the label’s Instagram on Tuesday. Sweeney modeled the Forget Me Not balconette bra ($59) in the ivory “Cheerio” colorway, styling the bra under a sheer white robe with a plush collar. “Syd for Romantic,” the brand captioned the three-part carousel — a nod to Syrn’s second collection, which the actress launched in February with a suburban-Americana shoot complete with rose bushes and a red riding lawnmower. The post included a close-up mirror selfie of Sweeney snapping a camera in…