Can I use composite colliders for a cinemachine Bounding Box?

Is it possible to use a composite collider in stead of a polygon collider as the bounding shape for a Cinemachine Confiner? I want two separate areas within my scene where my character can be moved with two separate confiners, but every time I try and make a composite collider, in stead of functioning as a bounding box, it functions as a collider and doesn't allow my character to collide with it. I think it's partially because a composite collider needs a rigidbody2D, and for a Cinemachine collider's bounding shape, you don't want a rigidbody component. Has anybody had success using this approach? Any help is much appreciated.