Advocating for a recall isn't the same thing as initiating one. The Education Minister was a logical first choice.
https://www.elections.ab.ca/recall-initiative/recall/Current-Recall-Petitions/
The person who initiated the first recall, Jennifer Yeremiy, is a former educator from the University of Alberta and currently a podcaster. Bit of an odd choice for the AFL to recruit considering she's not even part of any union.