Hi,
I know this topic is 3 years old, but I was wondering if it is still the case today?
OpenSCAP now provides Scap Security Guides for non-EL based distributions (including Ubuntu, Debian, OpenSUSE) so it should be working somehow. Any idea?
EDIT: Just saw this post: Failed to configure foreman agent on debian10 and ubuntu 18.04 os - #5 by ama213 - I’ll check if I can find a workaround in the meantime! 
Thanks guys
Quentin