How do I move payments in undeposited funds to bank deposit?

Good day, wierdapark.

I'm here to help you deposit the payments from the undeposited funds. All payments you put into Undeposited Funds account automatically appear in the Bank Deposit window. 

You can start depositing the payments to their respective bank by following the steps below:

1. Click + New in the left panel and choose Bank Deposit.
2. From the Account drop-down▼menu, choose the account you want to deposit the money into.
3. Select the box for each payment you want to combine. Make sure the deposit total and selected payments match your deposit slip. Use your deposit slip as a reference. Remember, only select payments you need for each deposit.
4. Select Save and close or Save and new.

In case you need to include bank charges or processing fees, you can go through the following articles below. Also, this will provide you an overview of how bank deposit works in QuickBooks as well as steps to remove a payment from there:

Record and make Bank Deposits in QuickBooks Online

What are Bank Deposits in QuickBooks?

Should you need additional assistance, please let me know by leaving a reply below. I'll be around to help you out. Have a good one.