Are you looking for any functionality in specific?

Some of the limitations are:

• Governance and Security: Fabric does not enforce Unity Catalog security policies on downstream users, and it does not support fine-grained access control, views, materialized views, streaming tables, or tables with row-level filters or column masks.
• Data Copying: Some integrations involve copying data into OneLake, which can introduce additional costs and governance challenges.
• Performance and Cost: Using OneLake and Direct Lake can be more expensive due to the need for a running Fabric capacity and the 3X cost penalty for accessing data from non-Fabric tools