Malt barley powder: pancake killer?

I got some barley malt powder at H Mart

https://hmart.co.uk/shop/en/pan-frying-powder/4496-tureban-dry-malt-barley-powder-400g-8804129001021.html

and tried using it in pancakes. The pancakes stay gooey and do not rise at all, not one bit, even with extra baking soda and a tiny bit of malt powder. I realized that the malt powder in the pancake recipes is malted milk so I have the wrong stuff. But I am curious why malt powder kills the leavening action of baking soda.

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My pancakes:

2 cups flour
2 - 3 Tbsp sunflower oil
1/2 - 1 Tbsp baking powder
1 egg
1 Tbsp sugar
~2/3 cup plain yogurt
add milk until right consistency to pour