Copilot agent unable to see on premises SQL data via MS Graph Connector

Created Microsoft Graph Connector for SQL on premises database via MS Graph Connector agent. Configured it on m365 admin portal. During Graph Connector configuration, preview shows the SQL table and data. Data indexing also completes successfully. Created Copilot agent in m365 and added the aforementioned Graph Connector as knowledge source. However, the Copilot agent is not able to answer questions about SQL data. It does not seem to have access to the search.