Still no dice at 30 hours post laundry dunking, but it's still got condensation in the lenses. It got so far, then turned itself off again. I won't try charging it, as apparently that is the likeliest to fry its innards.
The only thing that's foxed me to transfer over to mobile2 without a functioning mobile1 is MS Authenticator, but as there's no rush on that, I'll wait till I'm on a laptop that's recognised by MS.
Otherwise, a lot of passwords stored in Chrome, and managed to get WhatsApp working using my registered phone number. And via that, I'm back on Facebook.