Bumps on pink spotted plant?

I recently bought a pink spotted leaf plant and noticed when purchasing it had these hard white bumps on the top and bottom of a lot of the leaves. When I touch them and try to scrap them off they don't budge, it's like it's part of the leaf. I dont see yellowing spots or other signals of pests. So I'm not sure if this is a pest. I repotted it in new soil (1-1-3) parts orchid bark, perlite, soil. Watering When top half in to in is dry and I have in off to the side by a bright grow light. I've only had it for a couple weeks now tho. But idk what are the bumps?