Use PowerPoint as teleprompter software
How do I mirror a PowerPoint presentation?
Here you can see how PPT Mirror works: you simply mirror PowerPoint presentations and create a PowerPoint presentation with mirrored slides.
Animations are removed, because for a teleprompter animations normally do not play a role (and are rather annoying, because the constant switching of animations is more annoying than helpful for the speaker).
If for some reason a step-by-step presentation of elements is required, then simply use several slides for this, where the elements are faded in one after the other.