A Multicenter, Randomized, Double-blind, Placebo-controlled, Phase 3 Study to Investigate the Efficacy, Safety, and PK/ PD of Finerenone, in Addition to Standard-of-care, in Pediatric Patients, 6 Months to < 18 Years of Age With Heart Failure (HF) and Left Ventricular Systolic Dysfunction (LVSD) | Arctuva