NomNom is the most complete savegame editor for NMS but also shows additional information around the data you're about to change. You can also easily look up each item individually to examine its attributes, independently of a savegame, or get other useful information that are not related to a specific savegame (but enhanced if one is loaded).
This is due to the bigger structural changes within the saves in the Omega update. But I finished the background work for that now and it will be fixed in the next version.
The tabs listed are just grayed out and I'm unable to access them
[4.50.1.36-beta.6] Windows 10 Platform: Windows Game Pass