I only have a frustrating answer for you. You can of course always build the Debian packaging system (dpkg/apt) from source. That would be the most straight forward answer to what you're asking. But I would be doing you a huge disservice by not telling you why you shouldn't do that, so I'll do that for you as well. SUSE is built around RPMs and while I like dpkg better than RPM, I would never try to convert an RPM based distro to a debian based distro because they're architected differently. This is partly taken from here (archive), where there also is more Info.
Just for an overview (source in this archived page)):
apt(-get) is a package manager for Debian + Ubuntu + Linux Mint and all Linux Distributions build in DebianRedhat, fedora and CentOS are using
dnf/yumpackage managerArchLinux and all distributions build in arch as Manjaro, ... use
pacmanpackage manager"Your" openSUSE uses
zypperpackage manager, which is not so bad. You can consider searching for how to use it.