Just one thing to add, it’s my experience that calves are like forearms. They recover from load very quickly. As a result to grow quickly they need to be heavily overloaded, and quite often- unlike the big muscle groups like the quads. That being said, the simple change of training in stiff boots will probably resolve the specific issue you’re wanting to hit.
@psathyrella If you live somewhere that does not have readily accessible crampon climbing, how are you frequently training with crampons on? Is this something like, doing box stepups on scrap wood with an old pair of crampons and stepping onto the front points?