Is the "Default Engrams" property implemented?

I’m looking around “Game/PrimalEarth/CoreBlueprints/PlayerPawnTest” and am inside the “PrimalInventory1” component.

There’s a “Default Engrams” property, but I can’t quite figure out how to get it to work. My assumption is that each entry should contain the index of the engram to have unlocked, but that doesn’t seem to work. I’m wondering if this property is currently implemented or am I doing something wrong. Thanks!