Sample Gbuffer particles play in editor, not while game play

Hi,

I’ve coppied the Sample Gbuffer particles from ExampleContent Niagara Gbuffer.
While in editor I can see the particles spawning.
During the game play they are not showing at all.
Tried looking everywhere, it says in documentation that GPU particles are not event triggered, so I have no idea how to use them in game play.
Please help.
Thanks