I'm here to help you locate your deposits, jnggsmall.
Newly connected bank accounts only provide transactions for the last 90 days. You can download the older ones from your bank website in a supported web connect file format. Then manually upload them to QuickBooks.
If your bank is not newly connected, let's check if the transactions were not accidentally deleted. We can utilize the Audit Log. This feature helps see the activities made in your books.