Thank you for posting this in Microsoft Q&A.
The time it takes for changes to appear in Defender for Cloud (Security Center) after you remediate a recommendation varies based on the specific recommendation. Updates typically occur within a timeframe of 30 minutes to 24 hours, depending on the recommendation.
For example, the Freshness Interval for the Storage Account recommendation is set at 30 minutes, whereas the recommendation for Microsoft Defender for Servers has a duration of 24 hours.
You can find more information in the documents below
https://learn.microsoft.com/en-us/azure/defender-for-cloud/review-security-recommendations
https://learn.microsoft.com/en-us/azure/defender-for-cloud/implement-security-recommendations
Hope this helps. Do let us know if you any further queries.
Thanks,
Navya.
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