RecruitingPhase 1Drug trialA Study of LY4052031 in Participants With Advanced or Metastatic Urothelial Cancer or Other Solid TumorsThe purpose of this study is to find out whether the study drug, LY4052031, is safe, tolerable and effective in participants with advanced, or metastatic solid tumors including urothelial cancer. The study is conducted in two parts - phase Ia (dose-escalation, dose-optimization) and phase Ib (dose-expansion). The study will last up to approximately 4 years.