https://gasfeesnow.com/?ref=pixeljets.com
Matic has the cheapest for now. But need to check the availability of this network where you want to finally send your funds.
Tron network was cheaper before but now, BSC network seems to be favorable especially if both networks are available.
So the OP should check the availability of these networks and how much each platform is charging their customers.
Sometimes, the fees vary from one platform to another. So there's no fix answer to this question.