Keynote not updating and syncing with my devices

Hello Sanwop, 

Welcome to the Apple Support Communites. You’ve come to the right place to get help with using iCloud to keep your Keynote projects updated and in sync with all of your devices. 

From what we gather, you may be noticing that changes made using one device are not updating to the other devices that you use Keynote with. 

To start on this, we would first suggest checking the iCloud website using a computer web browser. Try to make a change to your Keynote document there and check if it updates to your other devices. 

It may also be a good idea to make sure that all of your devices have the latest version of Keynote installed, as well as any system updates. For Apple devices, the articles below can help you with updating: 

• Update macOS on Mac - Apple Support
• Update your iPhone or iPad - Apple Support

If you continue to notice the same issue, please be sure that you are using the following instructions to share your Keynote presentations: Sync a Keynote presentation across devices - Apple Support

You can also find additional troubleshooting suggestions in the following article: If you can’t find a presentation in Keynote for iCloud - Apple Support

For more help, we may suggest contacting Apple Support directly. You can find a contact link at the bottom of this last article: Keynote - Official Apple Support

We hope that this information helps you with syncing your Keynote presentations. 

Cheers!