unix21311 doesn't matter if it is Debian based or Arch based
KaOS is neither Debian or Arch based, it is fully independent.
Chromium is not in the KaOS repositories.
The question this topic was about, how Falkon and QtWebEngine are configured in KaOS was answered in the second post.
Now this thread is regression into debugging an application not available here on some distribution other then KaOS. This forum is not the place for that.
Open a new topic under Technical issues, if you have questions about running Falkon under KaOS.