Phone left in Snow for 48 + hours found by neighbor he turned it on

So on wed afternoon I dropped my phone getting out of a cab into a pile of snow it was in an otter box but there are gaps where water can get in. Fast forward to Sat morning a neighbor had found the phone when some snow melted he turned on the phone and it had 7% charge he called my dad and I eventually got it. The phone died the man had taken it out of the case and dried it off and tried to charge it but it wouldn't turn on.

I know you are not supposed to turn on or plug in a wet phone but it wasnt me.

I busted out the pentalobe screwdriver & opened up the phone there was some water in there i dried it off and started the process of taking it apart to do the iso alcohol thing. There are a few stripped screws that i cant get off (phone was purchased refurbished) & I cant get the logic board out. I dont care about this phone functioning long term I already have a new phone coming. I have an entire years worth of photos that are not backed up (spare me i know about Icloud I know i should have backed up but hindsight is 20/20).

So i just need this phone to turn on and work for an hour or two so that I can get the photos off it and back it up. I do not care if it never works ever again.

For now I have the phone open in a dry place. I figure ill just wait a week or so for it to dry and give it a go.

do you think its too late because it had been turned on and plugged in?

should I get it to the repair shop asap?

what do you think is happening to the device and how can I best respond to this?

P.S.

Lost Mode on Icloud did not work the way it is supposed to which I found disturbing.