Hey ghazal276,
We're sorry to learn that you've lost your Apple Pencil and you're having a problem locating it. We're glad to glad to provide assistance.
Use the Find My app to locate a missing device or item - Apple Support -- The only thing that Apple can provide to locate a missing device is using the Find My app. However, as you can see from this article, an Apple Pencil isn't included. An Apple device would need to be able to connect with the internet, and an Apple Pencil isn't incapable of this. If it connects to your iPad again, at least you'll know you're in the area it's located.
We hope you locate your Apple Pencil!
All the best.