A Phase 3, Randomized, Open-label, Multicenter Study Evaluating the Efficacy and Safety of TAR-210 Erdafitinib Intravesical Delivery System Versus Investigator's Choice of Intravesical Chemotherapy in Participants With High-risk Non-muscle-invasive Bladder Cancer With Susceptible FGFR Alterations Who Had Received Intravesical Bacillus Calmette-Guérin (BCG)

Inclusion criteria: * Histologically confirmed diagnosis by local pathology of papillary-only HR-NMIBC (defined as high-grade Ta or any T1, no CIS). Mixed histology tumors are allowed if urothelial differentiation is predominant. However, neuroendocrine, and small cell variants will be excluded * Have a susceptible fibroblast growth factor receptor (FGFR) mutation or fusion either by urine testing or tumor tissue testing (from TURBT tissue) as determined by central or local testing * All visible tumor completely resected prior to randomization. Urine cytology must not be positive or suspiciou…