Yael Biss lays out some changes:
We want to update on a strategic evolution in how you can access and utilize security insights within Microsoft Fabric! The powerful reports you’ve relied on in the Microsoft Purview Hub are officially transitioning and being significantly enhanced within the new Admin Report in the Govern tab of the OneLake Catalog, as was announced at Ignite in November and explained in the Govern in OneLake Catalog for Fabric admins (Preview) blog post.
This isn’t just a relocation; it’s a consolidation and elevation of your most critical governance data. This move is a direct response to your feedback and a key step in providing a more unified, intuitive, and action-oriented governance experience right where your data lives.
There’s a bit too much marketing hype in the blog post for me not to roll my eyes a bit, but the security insights themselves are useful.