There is currently some inconsistency with the availability of this stat for gear pieces.
1. It is accessible to accounts with only HoT expansion in the form of raid obtained accessories, raid obtained weapons, raid obtained armor and LS3 living world accessories.
2. The insignia and inscription for it is only available to accounts with PoF due it it being locked behind LS4 episode 5. HoT accounts have no access to the insignia and inscription.
This has not happened to the previous stat combinations that were available together with the living world releases.