WeIf your model upload is taking a long time or fails the optimisation process, it occurs most likely due to the high number of polygons in your model. Generally leaves, trees, plants contribute to polygons. Also, you can use this tool to find individual polygons of the object and can remove heavier one.
https://extensions.sketchup.com/en/content/3d-warehouse-tools
Make Incredible Presentations in Virtual Reality
Updated about a year ago