While, on the flip side of Val and pilot Rio’s tragic deaths during the heist, Beckett and Han become partners in Crimson Dawn crime for the remainder of the film; however, Beckett also doesn’t live to see any future Star Wars films.
At the end of the Solo film, Beckett–who has become a mentor to Han–doubts Han’s plan to trick the evil Crimson Dawn and safely deliver the Coaxium to a rebellion group. So, Beckett rats out Han, Chewy and Qi’ra to Crimson Dawn. Han ends up being the one to shoot Beckett and Beckett even praises Han for his quick thinking and “smart move,” or otherwise Beckett would have done the same.
It’s never easy to see a mentor get killed off in Star Wars, as characters like Beckett provide a sort of stability and sense of security to the story. When a mentor like Beckett is killed, even after he choses to side against the protagonist (Han), it’s unnerving because the structure they offer to the wily and unpredictable main characters goes away. On top of that, it was Han who killed his own mentor and the only father figure he’d ever known.