No, you can’t set up a Direct Debit from a non-linked bank account. Your Direct Debit can only be set up via your linked bank account in-app.
If you’re looking to update your linked bank account, you can do so by contacting us in-app!
Just head to the Portfolio tab > Profile icon > Contact us > Send a message > My details > Bank account.
Please bear in mind that your new linked bank will need to meet these requirements.