My 1992 lexus sc400 was left over night during a flood and water filled the inside all the way up to the center console I had power before the incident but after I have no power to the accessories or the headlights the battery is okay been charged checked and even used a new battery but somewhere im not getting power to anything else i checked the main fuses under the steering wheel and under the hood theyre all okay after some research im starting to think its the ignition switch just reaching out for help to see if anyone else has ever had this issue or can shed some light for me thanks.

Get yourself a few cans of electrical cleaner spray, some clothes.
Do not start the car for a few days. Things need to dry before that key is turned. Disconnect the battery and get to taking things apart and cleaning. Rug, seats, center console, and rear fuel relay located on rear pass side wall. You do not want mold to grow.

Take out the interior clean and dry everything, check all electronics, allow the car to dry completely, check seat motors etc. Then work on starting it. Check fluids in trans, rearend, engine to make sure they are not contaminated also.

...sounds like he already tried to start it