KeepassXC consider these options as "plugins", it's right there in their official documentation for the build options.
The Debian package wasn't shipping the correct default configuration in the first place, it's unfortunate but better late than never, and it's not like you can't switch to the keepassxc-full package.
Which is in line with how many other Debian packages work which is again why I think this isn't really a big issue from the perspective of a Debian user. Most of the upset seem to be coming from users of other distros unfamiliar with the Debian approach to doing things. I do agree it's annoying that this wasn't done from Day 1, but better late than never.
In this case it’s features that were patched out - not plugins or a mere config change.