I have a tinkering laptop set up with Fedora, DNF is as simple as APT and friendlier imo. I’ve switched to Nala (an APT wrapper that enables concurrent downloads) on my Debian PCs. YMMV.
Simply put: every distro needs its own package manager because the distros handle packages differently, from the way software is bundled and distributed, to where files reside in the filesystem.
E.g. APT is so friendly because of how rigid Debian is about the structure and info that is bundled within the .deb archive, which Pacman users tend to consider as unnecessarily restrictive bloat that impairs download/installation times. Meanwhile, yay (and other AUR helper programs) compiles the packages from source.
Although there are some that work across distros, like Nix or Homebrew. Plus there’s always flatpak or AppImages or (shudder) Snaps.
And of course, if you want people to think you’re basically a programmer, there’s always
<span style="color:#323232;">$ git clone <git repository>
</span><span style="color:#323232;">$ cd <git repository>
</span><span style="color:#323232;">$ sudo make install
</span>