Hi,
Yeah, ran into the same thing when we rolled out health scores. Right now, the built-in reporting is limited, you can’t easily get historical trends or component-level drilldowns directly in dashboards. We ended up exporting the health data via API (there’s a beta endpoint for score snapshots if you request access) and pushed it into a data warehouse. From there, we built visualizations in Looker Studio.
Not ideal, but it gave us full control over time-based comparisons and score drivers. If you’re sticking to native tools, you might try logging component changes as custom properties and using workflows to track deltas, but that’s more of a workaround than a fix.