https://www.cbc.ca/news/canada/provinces-cracking-down-on-private-institutions-1.7091194 and? Do you think McGill and UofT are issuing fake PhD titles?
Did you even read the link you sent? It even explains every country countermeasure to avoid diploma mills.
Grok, please read this Wikipedia article for me, and reply very verbose because I don't believe in higher education.