Hi @JooFragoso-0477,
It seems like the issue you are facing, where your Azure Dashboard graphs based on Application Insights queries unexpectedly stopped working, it is a known issue that might occur for several reasons.
Ensure that you have proper access to both the dashboard and the Application Insights resource: Navigate to the Application Insights resource. Under Access control (IAM), make sure the user seeing the dashboard is authorized (such as "Reader" or "Monitoring Reader").
Sometimes re-pinning fixes sync problems: Navigate to your Application Insights and go to the query that works. Pin "Pin to Azure dashboard" and choose the right dashboard.
Make sure the time range on the dashboard is the same as in the query. You can change the dashboard tile's time settings to correspond to the query. Go to the settings of the dashboard tile and verify the correct Application Insights resource is attached.
At times, clearing a cache or refreshing the dashboard may be sufficient. You might also try redoing the dashboard or verifying Azure's service health for outages.
https://learn.microsoft.com/en-us/azure/azure-monitor/app/overview-dashboard
https://learn.microsoft.com/en-us/azure/role-based-access-control/role-assignments-portal
If the answer is helpful, please click Accept Answer and kindly upvote it so that other people who faces similar issue may get benefitted from it.
Let me know if you have any further Queries.