@Cara - Thanks for the question and using MS Q&A platform.
Unfortunately, there is no way to Purview metadata for a creation of a custom report.
Internal team confirmed that this feature is on the roadmap. There is no fixed ETA. But we can expect by year end public preview.
Regarding service general availability, I would suggest to keep an eye on Azureupdates.
Azure updates provide information about important Azure product updates, roadmap, and announcements
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