At the moment, there isn't an audit log or a direct way to view who finalised or created the pay run in QuickBooks Online. I recommend contacting our Customer Care Team. That way, one of our support agents can raise this with our payroll experts and they can check who processed the pay run using one of their payroll tools.
Here's how to contact support:
Click on the Help (?) icon.
Select Assistant and enter Contact support in the chat field, and then click the Send icon.
You'll be asked about your concern, andyou'll need to enter and send it.
If you can't see any related topics to your issue on what they shared, select No, get me a human.