apt is a front-end/handler/alternative for apt-get as stated in man apt:
apt provides a high-level commandline interface for the package management system. It is
intended as an end user interface and enables some options better suited for interactive
usage by default compared to more specialized APT tools like apt-get(8) and apt-cache(8).
Which also has this stated as well:
Much like apt itself, its manpage is intended as an end user interface and as such only
mentions the most used commands and options partly to not duplicate information in
multiple places and partly to avoid overwhelming readers with a cornucopia of options and
details.
Therefore, man apt-get should be the resource for extended/specialized features ... And it has:
-f, --fix-broken
Fix; attempt to correct a system with broken dependencies in place. This option, when
used with install/remove, can omit any packages to permit APT to deduce a likely
solution. If packages are specified, these have to completely correct the problem. The
option is sometimes necessary when running APT for the first time; APT itself does not
allow broken package dependencies to exist on a system. It is possible that a system's
dependency structure can be so corrupt as to require manual intervention (which
usually means using dpkg --remove to eliminate some of the offending packages). Use of
this option together with -m may produce an error in some situations. Configuration
Item: APT::Get::Fix-Broken.
