UPDATE, March 10, 2021: This feature should now be available in all customer consoles.
New improved search capability for the Azure Sentinel Incidents blade is rolling out.
Originally, you could only search through the list of available Incidents by ID or title. With this improved capability, you can now search for ID, title, tags, owner, and product name.
This capability is continuing to rollout. If you don’t see this in your own Azure Sentinel console yet, just be patient. It’s coming.