Groups and layers are ignored by the GFUI. Also line thickness and clipping paths. Text will need to be converted to curves.
You can “group” items by making them the same color—the GFUI will separate them out by color and operation.
Operations are determined by artwork type. Vector outlines will default to cuts, filled vectors to engraves. Raster/bitmap will always be engraves.
Here’s a link to an SVG file I made that contains multiple steps and operations separated in this manner: Mastermind Game With Rack & Pinion Box Latching Mechanism