RecruitingDrug trialA Study to Compare the Combination of Navlimetostat (BMS-986504) With Pembrolizumab and Chemotherapy Versus Placebo Plus Pembrolizumab and Chemotherapy in First-line Metastatic Non-small Cell Lung Cancer Participants With Homozygous MTAP DeletionThe purpose of this study is to compare the clinical benefit of the combination of Navlimetostat (BMS-986504) (a selective MTA-cooperative inhibitor of PRMT5) plus pembrolizumab and chemotherapy versus placebo plus pembrolizumab and chemotherapy in first-line metastatic non-small cell lung cancer participants with homozygous MTAP deletion