If it’s not moving then I wouldn’t worry about it too much. But it looks pretty big.

Cut a line perpendicular to the crack and drop rebar into it. Do this every foot or so, or whatever makes sense. Widen any small cracks so you can fill them.

Fill with concrete that’s designed to stick to existing concrete. This should tie the crack together so it doesn’t move more.

Mud jack ahead of time if you need to level it out.

Simply filling with concrete or epoxy won’t do anything except reduce water intrusion until it widens again.