First of all, thanks for using the forum to raise these questions!
Yes, this is a known limitation of our PEP data coverage and indeed caused by the nature of the data sources.
To answer your questions specifically:
- Yes, sanctions lists are published for screening purposes, so they often include DOB, passport numbers etc. by design. PEP sources are usually published for transparency, not identity resolution. Most will give you a name and position, but not much more.
- We are actively working on closing this gap through our EveryPolitician project. In the near future, our PoliLoom tool will make it much easier to systematically add and verify biographical details for public officeholders. In the meantime, if you’d like to help improve coverage for the countries or positions most relevant to your use case, we’d welcome contributions.
P.S. If you’re interested, you can read about how the Loom is coming along in the development thread.