It's possible to embed your Sketchfab model on Polycount. There are two ways to show your model:
For example: https://sketchfab.com/3d-models/yor-095073f950d64605b2d99592193ec6f0
This will give a thumbnail embed with the title like this:
For example: https://sketchfab.com/models/yor-095073f950d64605b2d99592193ec6f0#UNIQSKFBVANILLA
This will give a larger embed like this: