When connecting your bank to QuickBooks Online (QBO), most financial institution allow importing transactions from the last 90 days, while some provide up to 12–24 months, Rod. Please know that all the bank transactions synced in the web version are accessible in the app.
On the other hand, if you need older data, you can use a web browser to manually import them by uploading a file from your bank. This helps ensure your entries are complete and your records remain accurate.
Feel free to reach out if you have any follow-up questions.