I was messing around with some D.Va builds in the stadium practice range, and noticed that the Heartbeat Sensor item, which gives you a little move speed buff and Sombra’s Opportunist passive didn’t show crit health enemies through walls at all.
Further testing and it worked on every other hero I tried it out on, and then I figured out it works with baby D.Va, just not while she’s in her mech.
I’m not sure whether this affects the movement speed buff as well, as it’s really hard to tell with just the 5% increase.