I would replace with a wooden post. Pour new footing next to post . I've never seen a cement collum on a porch like that.

Thanks! What about placing a 2" 4x4 between the column and the joist and tying the 4x12 and the 4x4 together somehow? I'm hoping to avoid a new footing and post if possible.

You can jack it up and shim it up 2" but if it settled that much it could settle again just as much.