It would be a great feature to have a search bar in the dashboard that could search for attributes in layers (similar to how you can set the search bar in Experience Builder). Currently, the only way to search is on the map or through a list.
While you can get this functionality in a pseudo-way from lists, there are limitations if you have too much data for the list to hold. It would be a great addition to the header feature. Then, you can use selectors or search.