I'm not aware of any country that disallows cutting off your access and ejecting you from the building immediately, and I didn't see anything in the article saying the author's pay ended at a moment's notice?
I don't think you can be kicked out like that (bar committing an egregious breach of company rules / the law) in the UK with zero notice (although I'm not a lawyer, obvs.) (unless the company goes into immediate liquidation? But can that even happen?) You need a consultation period for redundancies and I'm reasonably sure you have to have HR escalation for most other things, IIRC.
Your notice period is about pay, not about having a desk or any work to do.
Because the access to information goes both ways - however useful it may be for you to spend a few weeks telling employees remaining what you know, the company doesn't necessarily want you learning new things.
Yes, I know you can be required to stay out of the building whilst you're on your notice period but the post was about "cutting off your access and ejecting you from the building immediately" and I'm still pretty sure that can't happen in the UK without gross misconduct.