If I understand correctly this is just an extension so I don’t mind. But personally I’d prefer if they worked on their collaboration (Office) rather than some AI stuff

I’m no expert, but would CC BY-SA do the trick?

What electron Steam games are there? I don’t know about any

Debian is Debian based and regular Mint is Ubuntu LTS based and use theirs respective repos (not a big difference for the average user). While currently the non Debian version is the main and recommended version, due some controversial changes in Ubuntu people want to move away from Ubuntu and the devs have considered making the Debian edition the main one.