Why are my bank transactions not appearing?

https://quickbookhelpdesk.com/blog/missing-transactions-in-quickbooks/

This may happen because of temporary synchronization delays, connection interruptions, or pending updates between your financial institution and QuickBooks. Missing transactions in QuickBooks can create confusion and affect the accuracy of your financial records, but the issue is often caused by simple factors such as incorrect filters, bank synchronization delays, account selection errors, or recently modified records. In many cases, the transactions are still available and only need to be located using the appropriate settings.