There is currently no cross progression between Switch and other platforms, at the moment you can only have cross progression between Steam, Epic Games and Stadia.
You can find more information here:
What platforms is Cross-Progression on? As of right now, cross-progression is between Steam, Stadia and Epic Games Store. Will I be able to transfer all my purchases to a different platform? For the most part yes, however Auric Cells and some virtual goods will not transfer due to licencing restrictions. Virtual Currency,…
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There is currently no cross progression between Switch and other platforms, at the moment you can only have cross progression between Steam, Epic Games and Stadia.
You can find more information here: