I’ll try to explain more carefully.
I have the SVG file with a spaceship. Just spaceship made out of polygonal shapes. Without any other objects in the viewport.
I’ve added this ship to a scene in the Rive. Rive has created an artboard with this ship.
Then i’ve animated the ship, that she can fly.
Then i’ve added some particles made of circles directly in the Rive editor, they do not own to the svg naturally, they was created by Rive editor with shape tool. Then i’ve animated this particles and put it into a group within the ship.
But after the export to .riv and adding it to a runtime on the web page, there is only the spaceship in the canvas, no other particles that i’ve created with the editor in Rive has appeared. Not one. Only the ship.