For her top, Margot wore the DÔEN Jane Cotton Blend Voile Blouse, that is not available to buy. The blouse was created exclusively for Net-A-Porter, alongside a floral print version that is available to buy for £150. Thank you @melinfederico for first notifying me!
Her shoes are from the Fendi Fall 2019 Collection.
Margot’s earrings are by Maryam Nassir Zadeh. I believe she is wearing a similar colour to these Pink Glass Hoop Earrings, prices st $432. Thank you @dwjclosett for the help!