I tested setup Azure Purview and CosmosDB with Provisioned throughput capacity/ serverless capacity mode SQL API with few collections. After Cosmos Data source registration, I initiated scan and provided key vault with secret pointing to CosmosDB account key. For CosmosDB with Provisioned throughput capacity mode, data assets were discovered successfully.
For capacity mode - serverless CosmosDB SQL API, collection items were not identified as data assets after scan completion.
For CosmosDB with Provisioned throughput capacity mode, data assets were discovered successfully.
For capacity mode - serverless CosmosDB SQL API, collection items were not identified as data assets after scan completion.