Study to Evaluate DT-216 in Adult Patients With Friedreich Ataxia

Inclusion Criteria: * Genetically confirmed diagnosis of Friedreich Ataxia with homozygous GAA repeat expansions * Body mass index (BMI) between 17 and 32 kg/m2 * Stage 5.5 or less on the Functional Staging for Ataxia (FSA) Exclusion Criteria: * Has any concomitant medical condition that in the opinion of the investigator, puts the participant at risk or precludes participant from completing the study * Has clinically significant abnormal laboratory results * Has significant cardiac disease * Received an investigational drug within 3 months of screening Note: Other protocol defined Inclusion/Exclusion criteria may apply.