My distro's package manager will quite happily install all of those. From the main distro repo, even. I don't see any reason why I would mess around with flatpaks or other distribution methods.

I can literally count on one hand the pieces of non-game software I use that are installed from outside my distro's package manager (there's three if you include the inkscape plugin to drive my vinyl cutter).

So I repeat, this is either a distro issue or related to how you, personally, prefer to manage your system. It is not a general Linux issue.