my phone never gave a liquid detected alert. it just shut off.
I want to know if I should just make an appointment to take my phone into the apple store.
iPhone XS Max, iOS 15
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Phone frozen or will not turn on
Start here
If your iPhone won't turn on or is frozen – Apple Support (UK)
It you actually got it wet before this happened then the chances are the phone is ruined.
Take it to Apple Store for options for replacement or repair.
iPhone Repair - Official Apple Support
Or
Contact - Official Apple Support