https://dev.epicgames.com/documentation/en-us/unreal-engine/array-nodes?application_version=4.27
Remove Index
The Remove Index node removes an item within the array via that item’s index number. All remaining index numbers will update to close the gap.
As short answer Yes.
If you don’t want simply you can add a nullptr variable or similar to keep indexes in order. Like you can assign -1 to int array to distinguish its state.