Merged view of collections with items from different libraries

So I know you can have items from across libraries by using the same collection title in multiple libraries, but when you go to that view, you are presented with a view that lists the other items separately.
It’d be nice if we could have all the items merged into a master view at the top and ordered by year, just like happens when they are all from the same library. i.e. union the results of the searches and then apply the order by.

2021 clean-up: duplicate