Good day, Brenda.
I'm here to assist you in preparing your reports.
QuickBooks Online and QuickBooks Desktop have different features. Not all data will be converted when you switch from QuickBooks Desktop to QuickBooks Online and one of those is the custom reports. Some reports in QuickBooks Desktop aren't available in the online version.
Please refer to this article for more details: What to expect when you switch from QuickBooks Desktop to QuickBooks Online.
What I can suggest is to create new custom reports again in QuickBooks Online. I have the links here to help you on how to do it:
Please post again if you have other concerns. Wishing you all the best!