Sacituzumab Tirumotecan (MK-2870) in Combination With Pembrolizumab Versus Pembrolizumab Alone in Metastatic Non-small Cell Lung Cancer (NSCLC) With Programmed Cell Death Ligand 1 (PD-L1) Tumor Proportion Score (TPS) ≥ 50% (MK-2870-007)

Inclusion Criteria: * Histologically or cytologically confirmed diagnosis of squamous or nonsquamous NSCLC * Confirmation that epidermal growth factor receptor- (EGFR-), anaplastic lymphoma kinase- (ALK-), or proto-oncogene tyrosine-protein kinase ROS (ROS1-) directed therapy is not indicated as primary therapy * Provided tumor tissue that demonstrates programmed cell death ligand 1 (PD-L1) expression in ≥50% of tumor cells as assessed by an immunohistochemistry (IHC) central laboratory * An Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1 assessed within 7 days before randomization. * A life expectancy of at least 3 months. * Human immunodeficiency virus (HIV)-infected participants must have well controlled HIV on antiretroviral therapy (ART) Exclusion Criteria: * Diagnosis of small cell lung cancer or, for mixed tumors, presence of small cell elements. * Has Grade ≥2 peripheral neuropathy. * History of documented severe dry eye syndrome, severe Meibomian gland disease and/or blepharitis, or severe corneal disease that prevents/delays corneal healing. * Has active inflammatory bowel disease requiring immunosuppressive medication or previous clear history of inflammatory bowel disease (eg, Crohn's disease, ulcerative colitis, or chronic diarrhea). * Has uncontrolled, significant cardiovascular disease or cerebrovascular disease within the 6 months preceding study intervention. * Received prior systemic anticancer therapy for their metastati…