It’s possible but the plant in the picture has alot of chlorosis (yellowing) any deficiency’s progression will eventually turn into necrosis (dead brown tissue), so chances are thats just the progression of the Magnesium deficiency but… calcium is immobile, meaning it cannot be taken from older growth and supplied to newer growth, so any immobile nutrient deficiency will show on the new growth. Magnesium is a mobile nutrient and shows on older growth first.
Once you have any form of necrosis, it can not be reversed back to healthy green, chlorosis however can. So don’t be alarmed if the necrotic spots don’t go away after the yellow portions have returned to green.