Could it have been a browser like chrome or brave?
I don't recall the exact browser, but it might have been Chrome.
The issue isn't about acquiring more programs, as we can access almost all Linux software through package managers like gslapt, sbopkg, and occasionally the .deb repository.
Testing flatpak, I've installed a chess program, and all was fine.
The challenge lies in the unusual commands required to launch Flatpak. Using /usr/bin/program is indeed a matter of familiarity and convenience.