/etc/apparmor.d/abstractions.d will be probably available in Debian version 11 codename Bullseye.

https://forums.whonix.org/t/whonix-apparmor-profiles-development-discussion/108/689

https://gitlab.com/apparmor/apparmor/issues/50

Then https://github.com/Whonix/apparmor-profile-anondist/blob/master/etc/apparmor.d/abstractions/base.anondist no longer needs to be config-package-dev displaceed and can be split into appropriate drop-in files.