So, like the main thread suggested I already reported this to the 2K support but I’ve never seen that specific problem, figured it was worth a topic.
So I’ve bought the Digital Deluxe edition and got the Tier 3 characters with it. I played them all before - Including Cabot. I can still access Caira but NOT Cabot. Says I have to unlock him first. I somehow feel like there’s a bug with this specific character rather than the DLC, so I figured I’d report it here. Cheers!