Work experience gained under DACA does count for Canada's express entry program.

Per one of the best Immigration Canadian lawyers.

As far as I am aware CIC does not check for one's legal status in a country when providing points for work experience. This could change, but I have never heard of points being denied due to lack of status.

Best Regards,

Ram Sankaran
Associate
Stewart Sharma Harsanyi
Ford Tower
8th Floor, 633 -6th Avenue S.W
Calgary, AB T2P 2Y5