In this article you will know if your stack data is missing and how to retrieve those data.
Filtering conditions
Filter data
Sort data
Hide data
Firstly we will check if any filtering conditions are added that are preventing data from being visible?
It may be possible that data is in the stack, but just for some reason a filter condition has been applied. For that you can check by clicking on the filter option.
It may be possible that data is in the stack, but just for some reason asort condition has been applied and because of that empty rows are at the top of view. For that you can check by clicking on the sort option. 
It may be possible that data is in the stack, but some of your columns have been hidden. For that you can check by clicking on the hide option. 
Did someone delete the data?
If you are working with other collaborators who have editor or creator permissions, it is possible that one of them might have deleted that data.
On a laptop or desktop, you can restore views, rows, columns, and tables deleted within the past week from the Recycle Bin of your stack.
It can happen that the information you're looking for is not found in the recycle bin, this could be because the recycle bin information you're looking for was deleted more than seven days ago. If your stack or workspace has been shared with your collaborators, you can ask them and get confirmed that they had deleted or emptied the recycle bin.
You can check a history, which shows an activity feed of the changes made to a row when expanded.
Do any of your stack snapshots contain the now-deleted data?
More efficient than copying and pasting content from revision history record-by-record would be restoring a Stack's snapshot -- if one has been taken recently. 
