Welcome to the Community, @marcycpa.
Let me share more details about your concern about having an app for QuickBooks Online Payroll.
At this time, the QBO app is unavailable. Although, you can still manage your accountant users and clients in your QuickBooks account in a browser.
To learn more about managing accountant users and clients in QuickBooks, you can refer to these articles:
Additionally, the QuickBooks Workforce is a formerly QuickBooks Time mobile app to track time for yourself or track time for your crew.
In case you want to run payroll reports in the future, you can check out this article: Run payroll reports. It includes all the lists of payroll reports available in QuickBooks Online.
Tag me in the comment section if you have follow-up questions. I'm always here to help you.