Is there a way to set gravity to zero in UEFN ?

No problem, Here’s a step by step explanation on how to copy paste the device to your project:

  1. Copy the Device by pressing the “copy to clipboard” button

  2. Open Your UEFN Project

  3. When inside the project Right Click anywhere and press “Paste” or “Paste Here

KEEP IN MIND:

I’d recommend heavily testing this, because its actual zero gravity players can for example get stuck if they have no momentum mid air just floating at the same height (etc if you teleport them mid air or if they jump and hit a roof), I’d recommend if you’re gonna have players inside there to give them some remote signal managers or maybe input triggers that are connected to a movement modulator that will impulse them up/down and forward. There might be other issues like that so keep this in mind