Digital signature in Okular on windows

I’ve installed Okular on my windows 10 and wanted to sign it digitally. Okular could not detect my installed certificate, so I tried to point the path manually. Microsoft website suggests that it is at %SystemRoot%\System32\Certlog with an extension of .edb but there was no folder named certlog.

From what I understand Okular uses Poppler library to sign pdfs but from my regular search it seems that windows is not officially supported. Does Okular use unofficial build of Poppler for windows or it just doesn’t support it at all ?