Beautiful cat! If she is an indoor only cat , she is hiding very nearby. She probably don’t come back in her own, she will be hiding nearby so you need to look for her! Cats don’t run away when outside their territory (your house) they hide very close to their point of escape. The good news is indoor cats are always found you just need to look everywhere! Look with a flashlight even during the day. Put out her litter box ASAP and food and water and bedding. . Look under bushes, decks, porches and cars. Anywhere she could hunker down and hide in or under. Put flyers on neighbors porches asking them to check their property throughly for anywhere she could be hiding in case she slipped out of your yard. Look inside sheds snd garages too. Post on Nextdoor and file a lost report with with the shelter asap . Hope you find your kitty soon . Just don’t stop looking everywhere . Our daughters cat slipped out of the house and hid almost two weeks until we saw her on security cameras. We finally set a humane cat trap near her litter box and caught her within a few hours. So leave the porch light on and put out some tuna or smelly cat food where you can monitor from a distance. If she continues to hide set the trap in the early morning hours picking up all outside food. Do not leave food out at night. You will find her, just don’t stop looking.