RecruitingDrug trialElotuzumab + Iberdomide + Dexamethasone Post Ide-Cel in RRMMThe aim of this research study is to evaluate the efficacy of Elotuzumab and Iberdomide therapy post-Idecabtagene Vicleucel in participants with relapsed and refractory multiple myeloma. The names of the study drugs involved in this study are: * Iberdomide (a type of cereblon E3 ligase modulator) * Elotuzumab (a type of monoclonal antibody) * Dexamethasone (a type of steroid)