Yes, but trees don't heal , they compartmentalize. That wound has been open for some time and the tree is unable to fully close it. It will begin to rot from the wound inward as water, disease, pests, and other fun things begin to make their way inside until the trunk is soft enough it falls over in the next storm.

You're absolutely correct. This is a Norway maple (maybe a red maybe actually?) And they tend to get splitty due to bad structure where branches meet.

Look into "bark inclusion" if you're curious.