Ah, I think I misunderstood your question, sorry. But it's true, this is missing in DAW mode. Selected tracks are displayed simultaneoulsy on the SL mixer and in Studio One, but fader banks are not switched. You have to press to Next or Previous button. I am using a SL 16, so this problem is even more evident.
The CS18AI (for which DAW mode for Studio One was invented) also did not have this feature, but it had 4 buttons (A-D) for channels/tracks 1-64, which allowed direct access to e.g. track 48 on bank C.
I think we have to live with it. There seems not to be too much interest to develop DAW mode further. You can use the "Fat Channel Collection" plug-ins without any problems, but do you see anything of them in the scribble strips and any function on the encoders...?