Stuck on the sidelines : 1year+ on Bench

Joined EY GDS as a tech consultant about 1.5 years ago. Despite undergoing several full-stack development trainings, I've been consistently benched and haven't been assigned to any projects.

Meanwhile, my colleagues in other team with less or average skills have been successfully placed on projects, gaining valuable experience and promotions and hikes which indicates that there are projects available for staff level. I believe and as I’ve heard of, my senior manager is playing around, actively preventing my team, including myself, from getting project assignments.

I am feeling frustrated as from the beginning of my career , growth is stagnant. So I am seeking advice on how to navigate this difficult situation.