As far as I understand (and trust me, I am guessing all this), the qualification should be recognised by the governmental institution in place to do so. Like University degrees are usually recognised by an authority setup by the government.
I don't think a lot of certification (as good and hard as they may be) are recognised by a specific governmental authority.
To get 22 points, one needs (for example) a 3 year diploma, not 3 one-year diplomas. Similarly, they may expect a 3 year trade certificate, not many that add up to 3 years.
That is just my opinion and I could be wrong. The reason why I bring these up is to help you start a discussion. Good luck.