Hello,
Thank you for contacting Rank Math and sorry for any inconvenience caused.
Please check if cron jobs are working on your website or not, you can follow this guide to check that: https://rankmath.com/kb/analytics-issues/#num-2-check-the-cron-job
In order to fetch the data correctly and consistently, you need to have the cron jobs working and enabled in your installation.
If the cron jobs are working, please check if there is a pending Scheduled Action, go to WordPress dashboard > Tools > Scheduled Actions > Pending:
https://yourdomain.com/wp-admin/tools?page=action-scheduler&status=pending
Run the rank_math/analytics/data_fetch scheduled action and wait for the data fetch to complete.

You can check the progress at Rank Math > Analytics.
Once the data is fetched in the Analytics dashboard, the data will be populated in the next Email Report.
Hope this helps.
We look forward to helping you.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.