A unified data governance solution that helps manage, protect, and discover data across your organization
From what I am aware, Unity Catalog tags are surfaced in Purview as asset properties during scanning.
I haven't seen any documentation indicating that these tags are automatically mapped to native Purview classifications or custom governance tags, nor that a bidirectional synchronization is maintained after subsequent scans.
My understanding is that the tags remain 'metadata properties' imported from Unity Catalog rather than becoming Purview-managed classifications.