If you're assigned to the system administrator role, you have the choice to view sets according to two different filters:
Only the sets that you have been granted access to explicitly. For these sets, you or a role that you're assigned to has been granted access to view.
All sets defined in the system, regardless of who created them.
By default, the sets you can see are the ones that you have explicit access to view.
For example, enabling this option can be useful in cases where a system administrator has left the organization but you still need access to the sets that they created.
Note: If you have configured your deployment to automatically grant system administrators access to sets that other system administrators have created, those sets appear as part of the sets that you have explicit access to view or edit. For details about this setting, see Viewing all system administrator sets
To view all sets (System administrators only)
When viewing any resource where there are user-created sets, click Show All Sets in the Sets area to the right to see all sets in the system, regardless of who created them.
To see just the sets that you've created or sets that you have been granted explicit permission to, click Show My Sets.
The link toggles between Show All Sets and Show My Sets, and the link appears for the view that you're not seeing currently.