During a Cosmopolitan interview, famous actress Aubrey Plaza recently revealed that she auditioned for Deadpool 2, seemingly for Domino, Deadpool’s partner from X-Force. Unfortunately, her audition wasn’t successful, as the role eventually went to Zazie Beetz. She claimed, “[...] I really wasn’t in a good zone because you have to be in an auditioning zone, and I was in a ‘work zone.’ That one hurt. Me and Ryan Reynolds, what could go wrong?” The work she was doing then was actually FX’s Legion, another X-Men property.
Source:https://www.cbr.com/aubrey-plaza-legion-deadpool-2/