When I open duckdb.dll in DLL Export Viewer I see an empty list but when I open sqlite3.dll I see all of the functions:
SQLite:

Duckdb:

I think we need to add some DLL export flags to our functions for Windows to solve this problem. Have to look into it in more detail.
I have made a PR for a fix to this issue
When can we expect a new build ?
You can already download the pre-release binaries. But beginning of next month would normally be the time when we make a new release.
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I have made a PR for a fix to this issue