You can view raw data in the firewall log, you can run the following query:
AzureDiagnostics
| where ResourceProvider == "MICROSOFT.NETWORK" and Category == "ApplicationGatewayFirewallLog"
Matched/Blocked requests by IP
AzureDiagnostics
| where ResourceProvider == "MICROSOFT.NETWORK" and Category == "ApplicationGatewayFirewallLog"
| summarize count() by clientIp_s, bin(TimeGenerated, 1m)
| render timechart
refer - https://learn.microsoft.com/en-us/azure/web-application-firewall/ag/log-analytics
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