The best place to put requests like this is over at the Feedback portal: https://feedbackportal.microsoft.com/feedback/forum/ad198462-1c1c-ec11-b6e7-0022481f8472
Alternatively, you can build your own solution based on the Graph API, here's the corresponding endpoint: https://learn.microsoft.com/en-us/graph/api/meetingattendancereport-get?view=graph-rest-1.0&tabs=http