If you have confirmed that the bank is not yet supported in QBO, you can click Request support for your bank. On the other hand, there is no timeline on when the request will be approved. This process depends on the agreement between Intuit and your bank. Once this is approved, you can already connect your bank account.
Temporarily, you can ask a CSV file from your bank that contains your bank transactions. We can import this file in QuickBooks so you can categorize the transactions.