They are banning offices, not the actual app though

I think that the idea is that once they ban the offices, then they might have stronger legal justification to ban the app.

If related then media from all other countries but Canada should be banned from distributing in Canada?

There's a mandatory ratio for public broadcasting. It does ensure that the (same five) Canadian bands get radio airplay (35% must be Canadian), that broadcast television airs Canadian produced shows (50% annually), and so on. So, in a sense, yes?