Cats are notorious for vanishing for a few days and then returning again completely unharmed and acting as though nothing has happened.
As has been said put out some water and something strong smelling like bedding (if she has any) during dry days. I wouldn't recommend food or leaving bedding out at night or you will attract unwanted guests.
Spent some time outside, if she is hiding nearby she will be able to hear and see you, if you want to put out an empty food bowl she may come back simply to see if there is any food in there.
Other than that, ask around, see if anyone has seen her and leave some images with them and a phone number, if they spot her you will get a call.
Other than that maybe some small candle magick spells would be good, nothing big, but something easy and often effective.
Cats are good survivors, she may well simply be exploring her surroundings a little more than usual and being a cat, isn't aware that people will miss her while she's gone.
I hope you find her soon, best of luck.