How can you Import Payroll data (the actual JE) from Intuit Payroll into QB Online if the entry does not automatically download from the bank?

You can export then import the payroll data to QuickBooks Online, Bryan23.

When the payroll information is transferred, it creates one transaction in your bank register for each paycheck. For the detailed steps, please check this article on how to setup export of IOP data to QuickBooks Online (QBO). 

Let me also share the reference on how to get started with QuickBooks Online Payroll. 

We're just right here if you need more help with this.