This study is a 52-week, Phase 2 trial is designed to examine whether treatment with icovamenib in participants with T2D who are currently on standard-of-care antihyperglycemic medications (metformin, SGLT2 inhibitor, alogliptin, or sitagliptin) plus lifestyle management will result in a greater reduction in HbA1c than those therapies alone. The trial investigates participants who have been on a stable dose of their antihyperglycemic medication(s) for at least 3 months prior to screening whose HbA1c remains above the target established by the American Diabetes Association (ADA).