Took me a while to find this look! For her top, Margot wore an Outdoor Voices Back Cutout Sports Bra in the colour Oatmeal, which is currently sold out.
Margot also wore a pair of Lanston Sports Leggings. I’m not 100% on her exact but I think Margot might be wearing their pair of “Nolan” Leggings which are available for $110. Thank you @misskdodie for ID’ing the brand!