Is the iPhone X waterproof?

Dust/Splash/Water resistant. Rated at IP67 - Not waterproof. You can see examples of what it can withstand here.

"Submerge it into up to 3 feet deep for 30 minutes max - YES"

"Drop it in toilet - YES"

"Shower with it - YES"

"Surf, Swim with it - NO"

Unfortunately it’s not waterproof..

check this out for more information..

https://support.apple.com/en-us/HT207043

About splash, water, and dust resistance of iPhone 7 and later - Apple Support

It is not water proof at all.

It is water resistant.

Read the article supplied in the prior post to explain.