Hi there, rebeccamckay11,
QuickBooks Online lets you pull up a report to see who still owe superannuation.
Let me walk you through pulling up the Super Contributions report to get the information you need.
I'm also adding the How to automate Super Payments using Beam page to access super payments and reporting for more details.
Let me know if there's anything else you need, and I'm always around to help you out.