Next and Previous post in Collection

My theme under the post content displays section of previous and next post links.

I have created seperate “collection” with unique URL, branding.

“Next & Previous post” section shows links to posts from all blog like there would be only one default collection. How to hide post links which are not under the custom collection?

Perhaps, there is some routes,yml solution instead of heavy theme customisation?

This requires the implementation of dynamic routing for the next/previous post helper, which is not available (yet?). Please vote for it below: