Hi LSchmaltz,
Welcome to the Community. It's important to correctly enter your vacation policy to keep track of your vacation pay. QuickBooks Online payroll is a great program that gives you the ability to choose your pay type and deductions to pay your employees. I'd be glad to provide you with information on vacation pay.
When you set up vacation policy, the program allows you to manage vacation pay of your employees. I can see how beneficial it can be to calculate vacation pay on all earnings under federal labor standards regulations. I encourage you to find a third-party app to complete the task you're looking for. You can click on the Apps tab on the left navigation menu >and then select Find Apps.
If you'd like to include a new feature in QuickBooks Online, I recommend that you send us Feedback by clicking on the Gear icon at the top. This is sent to our Development Team to consider for future updates.
Let me know if you have any questions, I'll be happy to help.