This bonus scene is meant to be part of “Our Words Will Not Be Heard,” and the episode showed that Carisi’s relationship with Nicole is strong enough to endure some serious strain, so I take it as a good sign that Carisi is still willing and able to be the same kind of friend and partner he has been for Rollins over the years, even after moving to a position as an A.D.A., while also being in a relationship with Nicole.
Besides, Carisi deserves something stable in his life, if this is what he wants.
I take this scene as proof that there’s hope for Rollisi to be as close and caring as ever, no matter the nature of their relationship.