Hello @Gino Huang ,
Welcome to the Microsoft Q&A platform.
Unfortunately, you cannot forward Azure Logs to non-Azure SIEM.
Using Azure Monitor to route monitoring data to an Azure Event Hub allows you to easily integrate with some external SIEM and monitoring tools. The following partners are known to have integration via Event Hub.
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I would suggest you to provide feedback on the same:
https://feedback.azure.com/forums/911458-event-hubs
All of the feedback you share in these forums will be monitored and reviewed by the Microsoft engineering teams responsible for building Azure.
Hope this helps. Do let us know if you any further queries.
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