A family of Microsoft presentation graphics products that offer tools for creating presentations and adding graphic effects like multimedia objects and special effects with text.
Since you've already done the standard fixes (reinstall, reboot, Microsoft Support), this sounds less like a device issue and more like a compatibility issue between the latest iPhone/iOS version and the PowerPoint mobile app. PowerPoint for iPhone does support animations, but not all animation types behave the same on iOS, and some updates have introduced playback issues for specific animations.
A few business-focused checks I'd suggest next:
1.Test with a brand-new presentation
Create a new PPT with a single text box > Apply a simple Fade animation > Run Slide Show > If that animation works, the issue is likely with your presentation file rather than the phone.
2.Check how the file is stored
Open the presentation from OneDrive > Also save a local copy to the iPhone and test > Corrupted cloud sync can occasionally affect playback behavior.
3.Identify which animations fail
Do all animations fail or only certain effects (Pulse, Color, Grow/Shrink, Motion Paths, etc.)? Microsoft notes that some animation types are not fully supported across mobile platforms.
4.Test in presentation mode
Open the file > Start the presentation using the Slide Show button > Tap to advance animations. On iPhone, animations are triggered during slide advancement rather than always playing automatically.
Please refer the instructions and give me more details. Thank you