Uploading your own models is supported in Coohom, while there are restrictions.
What if the size of the Sketchup model is too large?
https://help.coohom.com/the-size-of-sketchup-model-is-too-large
How to Add and Modify 3D Models?
https://help.coohom.com/how-to-add-and-modify-3d-models
How to replace the material of SketchUp/3dmax models?
https://help.coohom.com/how-to-replace-the-material-of-sketchup-models