Where do KDE flatpaks store their settings?

Doing this specifically about KDE Flatpaks.

I am trying to export the needed Okular config files.

in /var/home/user/.var/app/org.kde.okular/config/ there is not a single file where removing it changes a single part of the UI.

Okular works without any static filesytem permissions, which means the configs need to be stored there somewhere.

Happy about help