RecruitingPhase 2Drug trialTafasitamab and Lenalidomide as First Salvage Therapy for Residual Large B Cell LymThe purpose of the study is to evaluate the safety and efficacy of tafasitamab and lenalidomide in participants with Large B Cell Lymphoma (LBCL) after axicabtagene ciloleucel (axi-cel) treatment. Participants will be asked to spend about 12 months in this study.