And while linux mint derived from Ubuntu, the snap service is disabled by default while iirc system utilities (like the software manager) are provided as flatpaks.
They're making the distinction because there are two Linux Mints, LMDE Which is based on Debian, and the Ubuntu variant, which is just called Linux Mint. It is not officially called Ubuntu Mint, I believe that was a colloquialism.
He means Linux Mint [0], a fork of Ubuntu with a fork of Gnome and snaps disabled by default. Is there even an Ubuntu Mint? You are probably confusing it with another name.
And while linux mint derived from Ubuntu, the snap service is disabled by default while iirc system utilities (like the software manager) are provided as flatpaks.