RecruitingRadiation therapySacituzumab Govitecan and Zimberelimab w/SRS in the Management of Metastatic Triple Negative Breast Cancer With Brain MetastasesThis is a Phase I/II Study to determine the safety and efficacy of Sacituzumab Govitecan and Zimberelimab with stereotactic radiation (SRS) in participants with metastatic triple negative breast cancer with brain metastases, compared to treatment with Sacituzumab Govitecan alone.