Hello again, @Zseb. I appreciate you taking the time to re-upload the photo as it helps to provide insight into the accounts.
There are multiple reasons why a bank balance won't match the one in QuickBooks Online (QBO), such as outstanding or duplicate transactions. Given the large discrepancies between these amounts, with one account differing by nearly 750,000 dollars, I would recommend looking first for duplicate transactions. The following article provides additional insight into this scenario, and others, as well as troubleshooting steps to help pinpoint the cause of the discrepancy: How to fix differences between QuickBooks balance and bank balance.
This article is a good place to begin in order to help determine why these balances aren't matching.
Should you have questions about this, or anything else, you can always find me here. Hope you have a great day.