Composer, pianist, and coach Felix Jarrar will present a pangender concert performance of highlights from Mozart’s “Così fan tutte,” titled “Così pan tuttx,” at New York’s Rockwood Music Hall Stage 3 on Feb. 26, 2022, at 4:30 p.m. The one-hour concert features vocalists Hannah Madeleine Goodman as Despina, Julia Claire Taylor as Fiordiligi, James M. Brown as  Dorabella, Juan Hernandez {…}