...Patients with histologically or cytologically confirmed:Metastatic NSCLC (adenocarcinoma) (Arm A), who have not received prior systemic treatment for their metastatic disease and who have:• no known sensitizing genetic aberrations where there are approved therapies (such as EGFR, KRAS G12C, BRAF V600E, MET skipping mutations, and RET mutations or rearrangements)orMetastatic SCCHN (Arm B) with no prior therapy and who have:• Histologically- or cytologically-confirmed recurrent (without metastases) or metastatic SCCHN considered incurable by local therapies. ...