Collisions between AI pawns

I’m making some AI pawns that use AI move to to move towards the player.
I have a lot of these actors, and they all form into one big intersecting clump.
How do I get ai pawns to repel/collide with each other?

You can just add collision component and set it to Pawn collision profile. This is simple and rather effective. For example, add Capsule, Box or Sphere collision compponents.

where do I find the pawn collision profile?

Here it is.