Suggestions: Have you tried putting out a can of stinky cat food? I’ve heard putting out their litter box can help them find their scent. Catnip? Ask neighbors to check garages/sheds she could be in. Any nearby sewers? Local cat colonies? You can post on Nextdoor and Paw post. My friend found his lost cat stick up in a tree recently. Prayers and fliers worked for me. Good luck! 🙏🏻
Also, I recently saw a post where someone set up a baby monitor to help find their cat…maybe try that or a ring cam? (I’ve now seen two posts with the cam working!)
EDIT: Another person has cautioned against leaving out food and/or dirty litter bc it could attract other animals, so do what you feel is best.