iPhone 7 water damage

Took my iPhone offshore yesterday. It’s handled soaked conditions (that it’s rated for) many times but I think it finally got severely damaged.

Home button stopped haptic touching (simulated clicking) but the fingerprint scanner still works. I can’t use the home button to return to home anymore. Also no audio is able to be processed through the speakers anymore. I haven’t tested wireless headphones or lightning headphones yet. Also I get no vibrations of any kind anymore. It also had problems turning on yesterday but fired up fine this morning. I dried it out a bit with rice overnight. Any thoughts on some potential fixes I can do to it? I’m pretty handy and already have done some repairs to the screen multiple times. I have the tools and the relative knowledge to get inside the phone I would just likely need a YouTube video or two to change out any parts.