Question about particle system with animation

So I animated a bunch of walking people in a collection.

I placed them on a plane with particle system hair > render > collection, targeting the collection of walking people.

Rotation is on Global X and people are doing the walking animation. The problem is that they are not actually moving on the Y axis which they are supposed to. The walking animation and movement are working fine on the original collection.

Can you guys take a look at the video and tell me where it went wrong? Because I’m actually stuck here.

I don’t think you should use a particle hair system, but just the regular system.