my Iphone 10R will not charge it seems like the charging port on the phone has a short
Whats the best way to troubleshoot the charging port possibly shorting out or needing cleaned?
A short circuit would be serious and may overheat or blow the charging brick
For open circuit, check with a flashlight and remove any debris with a wood cocktail stick
After that arrange a repair
https://support.apple.com/iphone/repair/service
Anything other than Screen or Battery eg the lightning socket may be a replacement phone and the price is in the article.
You can see additional service information within the following article:
Prepare your iPhone for packing and shipping