Is there a way to improve/enrich the PEP data quality?

General
1

I have noticed:

For sanctions entries (e.g., from UN, OFAC, EU, etc.), the records often include useful secondary identifiers such as date of birth (DOB), place of birth, nationality, gender, passport/ID numbers, aliases, and addresses — which significantly help reduce false positives during name-based matching.

For PEP entries, however, these secondary identifiers (especially DOB and official ID/passport/tax numbers) are frequently missing or incomplete in the dataset.

  1. Is this a known limitation of OpenSanctions’ PEP data coverage (e.g., due to the nature of public PEP sources, which are often official government announcements or registries that rarely publish DOB/ID details publicly)?
  2. Or is there a way to improve/enrich the PEP data quality when using the OpenSanctions API?