This is a user-to-user technical forum. Other than the site moderators - and occasional response from Community Specialists who attempt to respond to unanswered/inactive threads - Apple do not directly participate.
Nobody here has any idea about what may, or may not, be in Apple’s product development roadmap - and the Terms of Use that govern participation within the Support Communities prohibit speculation as to future products or features.
At present, you cannot natively unlock an iPad from an Apple Watch.
Apple do invite constructive feedback and feature requests via their Product Feedback pages:
Feedback - iPad - Apple