When will you bring iPencil to Numbers ?

This is a user to user forum. You are not addressing Apple. We users as such have no way of bringing the Apple Pencil anywhere.

Apple has already added a few Apple Pencil features to the recent version of Numbers. See here: Use Apple Pencil with numbers - Apple Support

Numbers supports the pencil on compatible iPad models for either drawing or navigating. So does Pages and Keynote. It has since iOS 10.