Figallo is usually a loosehead for his club. Argentina don't really have a lot of depth at tighthead. Nahuel Tetaz is second or third choice at Stade Français, Maxi Bustos is second choice at Montpellier (though no shame in being behind Jgenti, tbf), and Orlandi alternates starts and benches for Racing Métro.
As for the match, I reckon Pumas can take a few positives, but it was mostly a "welcome to the major league". They'll be gutted not to have scored and quite pleased not to have conceded the fourth try.