Thank you for using Apple Support Communities!
I understand from your post that you would like to delete iMessage stickers from your iPhone X. You can delete iMessage sticker apps by following the steps from the article below:
Use iMessage apps on your iPhone, iPad, and iPod touch - Apple Support
Manage iMessage apps
You can add apps to your Favorites so you have quick access to them in the app drawer. You can also reorder apps in the app drawer, remove the ones you don’t want, and more. Here’s how:
- Tap to open the app drawer. Then tap .
- Tap Edit in the upper-right corner to do the following:
- Tap Done.