Exporting Performance Metrics to external Grafana

### Problem Statement

We are creating a unified Grafana dashboard, that contains multiple panels from different data sources for web application monitoring - after creating an integration https://sentry.io/integrations/grafana/ we have noticed that it doesn't contain that much data:

Is there any way to export/create panels like in https:///organizations//performance/ ? because there it contains a lot of useful metrics like Transaction speeds, Transactions per Minute, Failure Rate, etc

Self-hosted Sentry 22.5.0

### Solution Brainstorm

_No response_

┆Issue is synchronized with this [Jira Improvement](https://getsentry.atlassian.net/browse/FEEDBACK-1875) by [Unito](https://www.unito.io)