Just tried to check for you, but ahhhh the product description photos of the shampoo only show a photo of the front of the package — not the back. Most packages state how long it lasts being opened.

This article says that shampoos typically last for 18 months after they've been opened https://www.realsimple.com/beauty-fashion/hair/hair-care/does-shampoo-expire#:~:text=%22Most%20shampoos%20will%20last%20for,degrade%20in%20quality%20over%20time.