Add an option to create a link in stack
As I’ve understood so far Stacks work similar to containers, and a container box can be linked so that could be an alternative if you aim to link a ‘stack’ or a group of elements; yet only the background area of the container (not covered by text or the elements inside it) can be clicked on the live site. Another option is to possibly add an empty shape (fully transparent) with a link above the stack, with the same margins of the stack.
I personally don’t quite see yet the utility of being able to link stacks tho, but those suggestions above might work