Regarding firestore-typesense-search extension: I am using it successfully to sync all documents from a top-level collection. Is it possible to use the extension to sync documents in a subcollection across all parent documents - something like document path: users/{doc}/userItems - where it indexes all users’ userItems in one Typesense collection?

This looks related to your question: https://github.com/typesense/firestore-typesense-search/issues/17

Thanks - yes that is exactly what I was looking to do. Hopefully backfill can be supported as well.