I am hoping for this to be used for all iPhones

First, Apple has NEVER NEVER, EVER said iPhone is Waterproof. Apple only claims iPhone is Water Resistant and that's a significant and huge difference. In addition, a water damaged phone as validated in Apple's warranty is not covered.

So, since no iPhone ever made has ever been Waterproof and Apple specifically says water damage is not covered under warranty, what happens is you buy either an Out of Warranty replacement phone for about 60% of the cost of the phone when new, or if your phone is older and the expense not a good investment, you buy a new phone.

By the way, no Samsung or Google Phone made or being sold is Waterproof and their warranties are the same. Liquid damage is NOT covered under warranty.