I thought that QNX was acquired by / is still developed by BlackBerry?

Seems you are right. See how complicated it is? :)

Indeed. And it has happened before that well-known brands change owners and suddenly push new products with certain risks attached for the user. That's all I wanted to point out, and for QNX it would be a very easy way to build trust by having this kind of information (or imprint) on their website.

So it's an elaborate front by South Korea instead.

You're joking but the north korea intrusions are factually established and an ongoing security risk.