I'm so sorry. I remember the thread showing the hatch. It is hard to lose one. BUT....there is a possibility that it got separated from family and could show up tomorrow morning. I've seen many posts where that has happened.
I had a hen that didn't come home from free ranging one night and I was sure something had gotten her because I searched all over high and low for her. Even well into dark with flashlights and could not find her. I called and called. I went to bed crying because it was my first loss and she had just turned one year old that day. Next morning there she was waiting outside coop like nothing ever happened. I think she just went on an overnight drunken birthday binge.
I've said a little prayer that Lucky will still be lucky and show up tomorrow morning.