Hi Kalel,
Based on documentation here - Use the Windows feature update compatibility risks report
This can take up to 52 hours
Here is also an issue similar to what you are getting - https://techcommunity.microsoft.com/discussions/microsoft-intune/problem-running-the-windows-feature-update-device-readiness-intune-report/4245009
If you find the answer above helpful, please Accept the answer to help anyone in the community who might have a similar question to quickly find the solution.