All the new metric ingest mechanisms are like this right now (e.g. Prometheus scraper, StatsD exporter, etc...). There's nothing I'm aware we can do right now but I have been told there is something planned to handle this.
We will allow to set a custom metric display name (primarily for custom metrics) in the future for all metrics ingested via new metrics ingest endpoint (https://www.dynatrace.com/support/help/dynatrace-api/environment-api/metric-v2/post-ingest-metrics/)
Also, with version 208+ the metric browser will also show the metric-key in the name column, in case the information is not set