On the web version of Asana, when converting a task to a subtask or adding a dependency, the field where you search for a task by name also allows you to paste a task’s link. This is super useful because sometimes tasks have the same names or might be hard to find.
This is not available on mobile (at least not iOS).
I’ll even go as far as saying this sounds like an easy fix
Hi, there folks! Sorry for the delay, but this functionality will be coming out soon. If you’re an Android user, it should have been enabled earlier today. If you’re an iOS user, you should receive it with iOS app version 10.71, which is scheduled for release next week.