Debian: Are apps in Discover store all Flatpaks by default?
I just installed Debian with the KDE desktop and I'm looking to see what kind of packages are available in the Discover store by default as they are not labeled i.e., Snaps/Flatpak. Should I install Flatpak? Thanks I don't to break anything
if you haven't added the flathub repository to your new debian kde desktop install, discover will only show you packages from debian's repositories that were automatically configured during installation.. even if you've added the flatpak 'backend' from inside discover--flathub still has to be added to your sources (see step 3 in link above).
once you have multiple sources of an application (for instance, 'vlc'), discover will add a 'sources' pulldown (top right, next to the 'install' button) where you can choose debian system package or flatpak (or snap, if configured).
which source you use is entirely up to you. on my own debian desktop, i usually stick with debs if it has what i'm looking for, as i've chosen debian and have accepted their pace at which new software is added. if i wanted 'bleeding edge' i would have installed something else entirely on it. but you can certainly go 'all flatpak' if you wanted to.
a lot of apps on the flathub website say "Unverified"
Those are usually either wrappers for proprietary stuff, for example the Chrome flatpak is unverified because it's not from Google themselves but rather somebody grabbing the official deb/rpm and rebuilding it into a flatpak (this is also how a lot of e.g. AUR packages on Arch work, basically), or open source stuff for which the dev/packager simply didn't care enough to do the verification stuff that Flathub wants you to do (doesn't actually seem that hard, but one might simply not have been aware of it or something).