CSV export only. FinFlow can export invoices and bills as a CSV file laid out for Xero's bill import. DocFila has no live connection to Xero.
In FinFlow › Reports, choose the Xero CSV export, then import the file in Xero yourself. Nothing is sent to Xero automatically.
There is no single Integrations screen. Cloud storage is in Settings › Cloud Sync and in a team workspace's Connectors tab. Slack, Gmail and Salesforce sign-in is in an organization's Settings. Accounting exports are in FinFlow › Reports. Outbound webhooks are an action in Tools › Workflows.
Keep going with the document workflow that matches this page. Open the tool you need, then finish the file in DocFila.