short answer = yes.
Ubuntu \ Canonical has an official centralized softwares repository here:
https://snapcraft.io/ (queried by the deamon snapd). As the name of its repository site indicates, Ubuntu now promotes the installation of
snap packages on its desktop distributions (PPAs remain the norm on server distributions, of course). For information, each snap installation creates an associated mount point.
That said, afaik, basically, a snap can package a *.deb, *.appImage, *.flatpak, or 0install package (package of package i.e. repackaging; ex.:
https://forum.snapcraft.io/t/install-existing-deb-file-as-part-of-snap-installation/10822/3)... Strange, but not impossible.
The advantage of creating a snap is to take advantage of the "distribution power" of the Ubuntu's snap store (e.g. Apple store, or Windows store). In other words, it allows to publish a binary software package by being correctly referenced, indexed in their store-catalog, and then installable from their store-catalog, without having to rely only on a good Google ranking for example.