If my iPhone is waterproof, will my speakers get damaged?

Ok.

We have passed along the facts, as to what you do with those facts would be your decision. Good luck.

Any of the thousands of components within the phone could be destroyed, including speakers. Why any one would wish to torture test an expensive electronic device, I have no idea.

No iPhone is waterproof, nowhere does Apple say it is.

iPhone is water resistant, not the same thing.

No iPhone is designed or meant to be submerged in water.

Your phone is not waterproof.