The Digital Threat scope in Apex Legends is gold/Legendary rarity, even though it's only a 1x scope — it doesn't provide any zoom. Instead, the description says it provides "threat highlighting". This sounds useful, so I've equipped and used it in several matches, often with a Wingman.
But... it just seems to work like an ordinary gray 1x scope. I've never noticed any sort-of highlighting or HUD effects. What does it do? How does it work? Am I just not noticing some effect, or is there something I need to do to activate this capability?