"Show reservation" button from task view doesn't work (mobile) / missing entirely (web)

In the mobile app, on the task detail view, the "Show reservation" button doesn't navigate to the reservation — it just goes back to the task list instead.

Separately, in the browser version, I couldn't locate any button on the task detail page that links to the associated reservation at all. This is important since many tasks are tied to a specific reservation, and there's currently no way to jump from a task to its reservation on web.