Best practice for unified cloud cost attribution (Databricks + Azure)?

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Hi! I’m working on a FinOps initiative to improve cloud cost visibility and attribution across departments and projects in our data platform. We do tagging production workflows on department level and can get a decent view in Azure Cost Analysis by filtering on tags like department: X. But I am struggling to bring Databricks into that picture — especially when it comes to SQL Serverless Warehouses.

My goal is to be able to print out: total project cost = azure stuff + sql serverless.

Questions:

1. Tagging Databricks SQL Warehouses for Attribution

Is creating a separate SQL Warehouse per department/project the only way to track department/project usage or is there any other way?

2. Joining Azure + Databricks Costs

Is there a clean way to join usage data from Azure Cost Analysis with Databricks billing data (e.g., from system.billing.usage)?

I'd love to get a unified view of total cost per department or project — Azure Cost has most of it, but not SQL serverless warehouse usage or Vector Search or Model Serving.

3. Sharing Cost

For those of you doing this well — how do you present project-level cost data to stakeholders like departments or customers?