Lynch contributed an essay to the 2018 book Feminists Don't Wear Pink and Other Lies, curated by , whose royalties went to the charity Girl Up.
Critics praised the performances of the supporting cast, often singling out Lynch for particular acclaim; A.
She rose to prominence for her role as Luna Lovegood in the Harry Potter film series, appearing in the last four films and their tie-in video games, as well as in the musical A Very Potter Senior Year.
In October 2019, Lynch was announced as a Lovie Award winner for her activism.