iPhone XS water damage.

The iPhone XS is stated to have a rating of  IP68 under IEC standard 60529 (maximum depth of 2 meters up to 30 minutes) - meaning the phone can withstand 'brief immersion in shallow pools of water. I happened to take my phone into a swimming pool for no more than 1 minute at 1-2 feet deep. My phone is now un-useable. I believed that I was able to take my phone underwater after reading Apple's guidance, I feel robbed after only buying this phone 4 months ago and not causing any damage to it over the 4 months. Was my phone manufactured incorrectly or is Apple just lying to me?