Why is my TRIVER account in Xero asking me to import a bank statement?
You don't need to import any bank statements to your TRIVER account in Xero
Once you have connected your Xero account to TRIVER and switched on auto-reconciliation, a TRIVER "virtual bank account" is setup in Xero, to represent your TRIVER facility.
If you visit the details page of that virtual bank account in Xero, you might see a message saying "Get started by importing a bank statement".

Don't worry about it, you don't need to upload any files or do anything. This is just a default message Xero shows in bank account pages that don't have any records associated to them.