It's definitely not waterproof by any means. It says water resistant, recommends against submersion, and does not list an IP rating.
You really ought to fact check things you're about to post on a forum like this, so you don't seem foolish.
iPhone X is rated IP67 - up to 30 minutes and 3 feet of submersion. So there's the waterproof (or at least, highly water resistant)
This is listed on apple.com (https://www.apple.com/lae/iphone-x/specs/) on the iPhone X specs page.