This article helps you export a single wallet from a wallet group. If you are looking for an article on how to export your whole portfolio, check out this one.
Follow these steps to export a single wallet which belongs to a wallet group:
Navigate to Settings and then tap on ‘Manage Wallets’
Select the wallet group that the wallet you are trying to export belongs to
Tap on the wallet’s address / ENS name and then on ‘Private key’ in the ‘Export Wallet’ section
Review all the security suggestions and proceed with caution
After entering your passcode you should be able to see the QR code that will allow the wallet to be exported