I've been trying to replicate De Zerbi on some occasions, mostly his attempt to lure the opponent out and then via 1 or 2 quick direct passes launching an attack.
My back line is similar to yours but I use 2 BPD as I like both my defenders to make the risky pass. My FB do indeed have stay narrower. My 2 wingers is, as you've said, what is the most difficult to replicate I've found as they stay really wide but De Zerbi plays really narrow. Wingers do the job fine of staying wide, but don't really replicate irl stuff. IW with stay wider doesn't seem to stay wide enough to my liking.
What I used was play out of defence with a lower mentality but a direct passing style. They will slowly play out of the back and when they see the opportunity they launch a direct pass forward to attack.