Hi Michael G,
Thank you for reaching out to us. I am Blessing, an independent advisor here and a Microsoft user like you.
Sorry for this inconvenience but the Data Entry Form feature is available in Excel for Windows PC but it is not available in Excel 365 for Mac.
Kindly find similar thread links for more information:
https://answers.microsoft.com/thread/efe4f27b-581e-4d90-a389-3c92a3105a42
https://answers.microsoft.com/thread/b3016eac-083f-497b-b20a-fefb4bbbc665
You can send feedback to Microsoft as well:
https://feedbackportal.microsoft.com/feedback
Hope this helps!
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