RecruitingPhase 2Drug trialA Phase II Trial of Mosunetuzumab, Polatuzumab, Tafasitamab, and Lenalidomide in Patients With Relapsed B-cell NHLTo learn if giving mosunetuzumab in combination with polatuzumab vedotin, tafasitamab, and lenalidomide can help to control relapsed/refractory FL and DLBCL.