My iPhone got wet

If the device got wet, and you cannot power the phone on, then your only chance might be to take it to some 3rd party repair that may be able to disassemble the phone to recover the memory. I would be very careful about my choice, and find one that would only charge you if they make a recovery. Otherwise, the data is lost. The only other chance is if you had a backup of the phone while the photos were on the phone. Then they would be in the backup.

You're welcome. Seems the photos are rather old. I hope you have learned a lesson. As soon as you get anything of any importance, import that off the device to save them. Especially something as old as what you have. One with a 30-pin connector is all the way back to the iPhone 4 and 4s days, 7-8 years ago.