Your kitty is probably not far, cats who have not been accustomed to going outside are generally very timid, find a hiding spot and will not come out even when the owners are calling them if they are scared.
Have you tried looking at 3-5AM? This is generally the time they will come out of hiding. Perhaps taking a flashlight to peer in hiding spots to look for the reflection of eyes. She may only be a couple of doors down hiding under a deck or in a shed.
Are you able to leave some of her used kitty litter outside so she can smell her scent?
and please keep us updated.
Cat maid to:
Puddles, female Himalayan (16 yrs)
Jasper, male Ragdoll ?? (approx 9 yrs)
Sweet Pea, female silver tabby DSH (approx 7 yrs)
Rose semi feral, a cpietra rescue, female tabby (approx 6 yrs)
Snowball RIP (1991-2005)
In a cat's eye, all things belong to cats.-English Proverb
“While we are free to choose our actions, we are not free to choose the consequences of our actions.” Stephen R. Covey