It depends on the source of the calcium. Calcium sulfate (gypsum) will not raise pH, but calcium carbonate (lime) will. I suspect that part of the calcium in your mix is from triple superphosphate, which might degrade to calcium carbonate?
Mangoes do need calcium, so it is a good idea to provide them with calcium. But you have to be sure to keep the pH neutral or below.
Fortunately, pH is extremely easy to correct with sulfur. It's not a bad idea to sprinkle a few sulfur pellets on your potted mangoes once every year, especially if you're irrigating with city or well water, which would contain calcium carbonate.
Ive been looking for a granule 7-5-4 fertilizer to use for my potted trees and have came up empty handed. I did find a citrus / avocado mix made by peaceful valley farms all derived from natural components . The formulation is 8-5-4- with a 3% calcium . My question is , would the calcium over time effect for instance my mangos ? Appreciate any feedback on this matter.