Guys if you look this up, the controller is basically an ergonomic design and "modified" was a poor wording choice where he should have said "different" instead.
Google search: The AIM PS5 controller does not natively include features like turbo or built-in auto-aim. Instead, it is a customized official DualSense controller designed for competitive gaming, focusing on enhanced ergonomics and faster response times through physical modifications.
So it's more about extra buttons, adjustable stick heights, etc. I'd be extremely surprised if his ban was purposeful and I can imagine how frustrating that must be.