Where in the Lykke app do I find the ERC20 token section?

You can find your tokens displayed in your ETH Private Wallet. If you have ERC20 tokens supported by Lykke, you can transfer them to your ETH Private Wallet. After that you can see your tokens in the corresponding wallet. 

To know more about the list of supported ERC20 tokens currently supported in the Lykke Private Wallets, you may check the related article below: