OnTriggerEnter Not Working

Okay, I know this is a commonly asked question, but I can't seem to find an answer that covers my scenario. Hopefully I'm just overlooking something really simple.

I have 2 objects: both have a Rigidbody, both have a Box Collider (not trigger), and one has a Box Collider that is a trigger as well (screenshots below). At first I thought maybe having 2 Box Colliders on a single object was the issue, but disabling the non-trigger collider did not result in any improvements.

Both are on the Default layer, and collision settings are fine.

There is also a script attached to the object with the Trigger which is not executing:

 void OnTriggerEnter(Collision col)
     {
         Debug.Log("Trigger Detected");
         ...
         
     }

Any input is appreciated (as always). Thanks!