Split Ticketing doesn’t add any additional changes to your route. So, if your journey had no changes in the first place, there would still be no changes.
If your journey included a change anyway, then this will still apply. Your tickets won’t always ‘split’ at the same point that your train changes though. You can find a detailed breakdown in your Journey Tracker.
The only condition when using Split Ticketing is that the train you take must stop at all the places you’ve bought tickets for and not just pass through them.