Hi, I would like to keep this thread alive as I encountered the same problem when I packaged the game for android.
I selected ETC2 option for packaging and tested it with my phone. An explosion animation done with Niagara system didn’t spawn or it just didn’t show anything visually.
When I tested on mobile preview mode on editor, Niagara effects worked, but still required couple of seconds to compile the shader. It didn’t show the effect fully in the first couple of trigger events. It still requires some time to wait after the first trigger event to show the full animation.
Couldn’t find a solution yet…