IBAN stands for International Bank Account Number. It is a maximum of 34 alphanumeric characters that identifies a specific bank account.
SwissBorg's IBAN and bank details can be found by tapping on "Deposit" in the Portfolio screen, then selecting the desired fiat currency and switching from the LOCAL tab to SWIFT.
You can tap on any row of the banking details to copy the information, then all you need to do is paste the details in your banking app. Don't forget to include your reference number!
Under tab LOCAL, if available for your location, you find the bank details for Local (SEPA) transfers. For these transfers your IBAN is unique and you are the Beneficiary, not SwissBorg Solutions OU, so there is no unique reference number that needs to be included.