The midi mapping capabilities of Unify mentioned in vids would seem to have uses for splitting Scaler outputs to multiple instruments. I have no hands on experience with Unify.
Most DAWs (if not all) can route Scaler’s output to multiple instruments. And, as was mentioned before, if they cannot (for whatever reason) then it’s a simple thing to use one Scaler for each instrument and sync the Scalers.
I have a valid Unify license.
Unify has a demo version you can try out.
Are you specifically thinking about splitting the keyboard into zones?
This can be done for free without buying/trying Unify.
The plugin is free and is called MidiPolysher.
Yes, I just posted (yesterday and today) two pieces I did with Scaler 2.5 and Unify, and you can indeed get different parts of a midi to play on different instruments. You can control the keyboard range for different instruments in the same instance of Unify in your DAW, and control any aspect of it with CC messages. I suggest you try the demo as Jamieh mentioned.