Welcome to the Community, Susie22.
When connecting your bank account, QuickBooks Online (QBO) automatically and securely downloads your transactions. It saves time using the existing data from your bank since you don't need to manually record transactions. QuickBooks will continue to automatically download your transactions so your accounts stay up-to-date.
We ask for your online banking credentials (username and password) to establish a one-way connection with your bank. The connection and info from your bank are "read-only." which means QuickBooks can “read” the data, but can't process payments or get personal data from your transactions. Then, the info only goes one way - from your bank to your QuickBooks account. To learn more about this one, see the Privacy and security in QuickBooks article.
On the other hand, we can only connect bank and credit card accounts to QBO or get transactions from your bank or credit cards and manually import them into QuickBooks.
Feel free to visit our Banking page for more insight about managing your bank feeds and reconciling accounts.
I'd like to know how you get on after trying the steps, as I want to ensure this is resolved for you. Just reply to this post and I'll get back to you. Have a great weekend.