phone not charging after mloisture detection

You need to wait for it to dry out. However, if you really need it charged, you should still be able to use wireless charging.

Hello,

If you have a case on your phone, remove it and let everything dry out for a few days. Do not try to charge it in the meantime.

See this:

About splash, water, and dust resistance of iPhone 7 and later 

Water and other liquid damage to iPhone or iPod isn't covered by warranty 

Good luck.