Last Wish armor 2.0 mods are currently broken and are sharing the text of "this has been deprecated" with the old style consumable mods that were recently deprecated.
The armor 2.0 mods themselves are still available to be slotted and seem to still be dropping from chests in Last Wish.
I'm assuming these are broken as a side effect of a patch from years ago to link the old mod descriptions/effects to the new armor 2.0 descriptions/effects when the old mods were incorrectly functioning outside of the raid.
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Hello. I appreciate you reporting this issue to us. We're aware that it's occurring and we're investigating.
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They only became "depreciated" recently. It is possible that it is an accident, but they did a lot of stealth cleaning of old armor 1.0 this season and they did some more with the recent Hot Fix. Hopefully Bungie catches on and undepreciates them